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butterfly valve is a quarter-turn rotary motion valve used to stop, regulate, and start the flow. The butterfly valve has a flap mounted on a rotating shaft. When the butterfly valve is completely closed, the disc will completely block the pipeline. When the butterfly valve is fully opened, the flap is at right angles to the flow of gas or liquid.

Butterfly valve parts:

The butterfly valve has only four main components: valve body, valve disc, valve stem, and valve seat.

Butterfly valve body: The valve body of the butterfly valve is usually installed between the two pipe flanges, the most common is the lug and wafer valve body design.

Butterfly valve flap: The flap is the way the valve stops flowing-it is equivalent to a plug valve in a plug valve, a gate in a gate valve, or a ball in a ball valve. To improve flow, sealing, and/or operating torque, there are changes in the design and direction of the valve disc.

Butterfly valve stem: The valve stem of the butterfly valve can be an integral shaft or a two-piece (separate valve stem) design. In most elastic valve seat designs, the valve stem is protected from the effects of media, so materials can be effectively selected in terms of cost and mechanical performance.

Butterfly valve seat: The valve seat of an elastic valve seat butterfly valve uses an interference fit between the flap edge and the valve seat to provide closure. The seat material can be made from many different elastomers or polymers. The seat can be bonded to the body, or it can be pressed or locked.

Butterfly Valve

Advantages of butterfly valves

The butterfly valve is easy and quick to open.

Rotate the handle 90° to completely close or open the valve. Large butterfly valves are usually equipped with a so-called gearbox, which connects the handwheel to the valve stem through gears. This simplifies the operation of the valve, but at the expense of speed.

The manufacturing cost of butterfly valves is relatively low.

Due to the design of the butterfly valve, it requires less material. The most economical type is the clip-on type sandwiched between two pipe flanges. The other type is a lug wafer design, which is fixed between the two pipe flanges by bolts connecting the two flanges and the through-hole of the valve housing. In addition, ordinary butterfly valve materials are generally cheaper.

The butterfly valve requires less space.

This is because their compact design requires much less space than other valves.

Butterfly valves are often associated with reduced maintenance.

Butterfly valve reliability and reduced maintenance requirements make it popular. Their reduced degree of wear makes the valve's life longer. This reduces direct operating costs and reduces the time required for valve maintenance.

Butterfly valve application

Butterfly valves can be widely used. They perform well in large volume water applications and mud applications. The following are some typical applications of butterfly valves:

Cooling water, air, gas, fire protection, etc.

Mud and similar services

Vacuum service

High-pressure and high-temperature water and steam facilities

Compressed air or gas applications

The above information is provided by a butterfly valve exporter.


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    vidno vsem

    Oil Stain Cleaning Kitchen Detergent With Good Smelling

    Product Description

    Type:Detergent                                               Detergent Type:Cleaner

    Detergent Use:  Kitchen                                  Shape:Powder

    Feature:Disposable, Eco-Friendly                   Place of Origin: Hebei, China

    Brand Name:Sida                                            Model Number:250g

    Use: kitchen cleaning                                      Function: Remove Stains

    Services:OEM                                                   Origin: Hebei china supplier

    Oil Removing Powder:The decontaminate effect is great excellent, it can deal with any grease,stubborn stains,and good smelling,kind to hand.

    We provide you with  best quality and  the favorite price. Welcome to inquiry

    Strong removes stubborn greases from kitchen utensils, like dishes, pots, pans, range hood ,etc.

    The scale is harmful, and the descaling and replacement health

    Kitchen Stains Removal Cleaner Features:

    This product uses active oxygen factor, mild and non-irritating and does not hurt the hand. It is suitable for refrigerator interior, pot lid, cooktop, oil pan, oil rag, oil brush, oil plate stain, bathroom glue stain and so on. This product is safe to use, harmless to the human body and environmentally friendly.

    Sticky Oil Stains Removing Instructions:

    Put the product and the rag in the basin at the same time, pour hot water (this will release a lot of gas, which is a normal phenomenon), and then use a rag to clean the glue stain on the kitchen utensils. 2. Key adhesive stains, can be directly rubbed with this product with a semi-dry cloth. Adhesive stains on the ground can be directly sprinkled on the product, then rinse off with hot water. 3. If there is any sticky stain on the sewer, you can pour the product into it and then use boiling water for about 1 hour to dredge.

    Handan sida detergent factory has been engaged in household washing products for 20 years since 1996.The main business livelihood inseparable from the daily chemical products, the product range covers "fabric washing, protection, elimination,Household cleaning, fresh air, hair care, "Eco-Friendly Detergent, 360 Detergent Scale, kitchen cleaning powder, Oil removal clean powder, Stubborn Stains Removal Cleaner, High Foam Washing Powder, Biological Washing Powder, Oem Cleaning Paste, Xiaoqiang's Father Cleaning Paste.


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      vidno vsem

      Butterfly valve supplier shares with you.

      Soft seal:

      The two sides of the sealing pair are made of metal materials, and the other side is elastic non-metallic materials, which are called "soft seals". This kind of seal has good sealing performance, but it is not resistant to high temperature, easy to wear, and has poor mechanical properties. Such as steel rubber; steel PTFE etc. The soft seal seat is made of non-metallic materials with a certain strength, hardness, and temperature resistance. It has good sealing performance and can achieve zero leakage, but its life span and adaptability to temperature are relatively poor.

      Butterfly Valves

      Hard seal:

      The two sides of the sealing pair are made of metal materials or other harder materials, which is called "hard seal". The sealing performance of this kind of seal is poor, but it has high-temperature resistance, wear resistance, and good mechanical properties. Such as steel; steel copper; steel graphite; steel alloy steel; (the steel here may also be cast iron, cast steel, alloy steel may also be overlay welding, sprayed alloy).

      The hard seal is made of metal, and the sealing performance is relatively poor, although some manufacturers claim that it can achieve zero leakage. The soft seal can not meet the process requirements for some corrosive materials, a hard seal can be solved! These two types of the seal can complement each other. In terms of tightness, soft seals are relatively good, but now the tightness of hard seals can also meet the corresponding requirements! The advantage of the soft seal is good sealing performance, the disadvantage is easy aging, wear, and short service life. Hard seals have a long service life, but the sealing performance is relatively poorer than soft seals.

      The main structural differences are the following:

      1. Differences in structure: soft seal butterfly valves are mostly centerline type hard seals, mostly single eccentric, double eccentric and triple eccentric butterfly valves

      2. Temperature resistance: Soft seal is used in a normal temperature environment. The hard seal can be used in low temperature, normal temperature, high temperature, and other environments

      3. Pressure: soft seal low pressure-normal pressure, the hard seal can also be used in medium and high pressure and other working conditions

      4. Sealing performance: The soft sealing and triple eccentric hard sealing butterfly valves have better sealing performance. The triple eccentric butterfly valve can maintain a good seal under high pressure and a high-temperature environment.



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        vidno vsem

        Household use strong oil stain removing detergent clean powder

        Product Description

        Type:Detergent                                               Detergent Type:Cleaner

        Detergent Use:  Kitchen                                  Shape:Powder

        Feature:Disposable, Eco-Friendly                   Place of Origin: Hebei, China

        Brand Name:Sida                                            Model Number:250g

        Use: kitchen cleaning                                      Function: Remove Stains

        Services:OEM                                                   Origin: Hebei china supplier

        Eco-Friendly Oil Removal Clean Powder:The decontaminate effect is great excellent, it can deal with any grease,stubborn stains,and good smelling,kind to hand.

        We provide you with  best quality and  the favorite price. Welcome to inquiry

        Strong removes stubborn greases from kitchen utensils, like dishes, pots, pans, range hood ,etc.

        The scale is harmful, and the descaling and replacement health

        China Strong Cleaner Powder Features:

        This product uses active oxygen factor, mild and non-irritating and does not hurt the hand. It is suitable for refrigerator interior, pot lid, cooktop, oil pan, oil rag, oil brush, oil plate stain, bathroom glue stain and so on. This product is safe to use, harmless to the human body and environmentally friendly.

        Mild Oil Removal Clean Powder Instructions:

        Put the product and the rag in the basin at the same time, pour hot water (this will release a lot of gas, which is a normal phenomenon), and then use a rag to clean the glue stain on the kitchen utensils. 2. Key adhesive stains, can be directly rubbed with this product with a semi-dry cloth. Adhesive stains on the ground can be directly sprinkled on the product, then rinse off with hot water. 3. If there is any sticky stain on the sewer, you can pour the product into it and then use boiling water for about 1 hour to dredge.

        Handan sida detergent factory has been engaged in household washing products for 20 years since 1996.The main business livelihood inseparable from the daily chemical products, the product range covers "fabric washing, protection, elimination,Household cleaning, fresh air, hair care, "Eco-Friendly Detergent, 360 Detergent Scale, kitchen cleaning powder, Oil removal clean powder, Stubborn Stains Removal Cleaner, High Foam Washing Powder, Biological Washing Powder, Oem Cleaning Paste, Xiaoqiang's Father Cleaning Paste.


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          Slika od Alice Lu
          od Alice Lu - sreda, 8. julij 2020, 08:37
          vidno vsem

          Marine valve exporter shares with you.

          Leakage of valve body and bonnet

          the reason:

          1. The casting quality of the cast iron parts is not high, and there are defects such as sand holes, loose structure and slag inclusion on the valve body and valve cover body;

          2. Freeze cracking;

          3. Poor welding, there are defects such as slag inclusion, unwelded, stress cracks;

          4. The cast iron valve is damaged after being hit by a heavy object.

          Maintenance method:

          1. Improve the casting quality, and perform the strength test in strict accordance with the regulations before installation;

          2. For valves with air temperature below 0℃ and below 0℃, heat preservation or heat mixing shall be carried out, and the valves which are out of service shall exclude accumulated water;

          3. The welding seam of the valve body and valve cover composed of welding shall be carried out in accordance with the relevant welding operation regulations, and the flaw detection and strength test shall be carried out after welding;

          4. It is forbidden to push or release heavy objects on the valve, and it is not allowed to hit the cast iron and non-metallic valves with a hammer. The installation of large-diameter valves should have a bracket.

          Leakage at the packing

          The leakage of the valve is the largest in the packing.

          the reason:

          1. Wrong choice of filler, not resistant to the corrosion of the medium, not resistant to the use of high pressure or vacuum, high temperature or low temperature of the valve;

          2. The packing is not installed properly, and there are defects such as small-to-large, bad spiral coiled joints, loose tightening, etc.;

          3. The filler exceeds the service period, has aged, and has lost its elasticity

          4. The precision of the valve stem is not high, and there are defects such as bending, corrosion and wear;

          5. The number of packing circles is insufficient, and the gland is not pressed tightly;

          6. The gland, bolts, and other parts are damaged, so that the gland cannot be compressed;

          7. Improper operation, excessive force, etc.;

          8. The gland is skewed, and the gap between the gland and the stem is too small or too large, causing the stem to wear out and the packing to be damaged.

          Self Contained Check Valves

          Maintenance method:

          1. The material and type of filler should be selected according to the working conditions;

          2. Install the packing correctly according to the relevant regulations, the packing should be placed and tightened circle by circle, and the joint should be 30℃ or 45℃;

          3. Packing that is too long, aging or damaged should be replaced in time;

          4. The valve stem should be straightened and repaired after bending and wear, and it should be replaced in time for serious damage;

          5. The packing should be installed according to the specified number of turns, the gland should be tightened symmetrically and evenly, and the pressure sleeve should have a pre-tightening gap of more than 5mm;

          6. The damaged gland, bolt and other parts should be repaired or replaced in time;

          7. Observe the operating regulations, except for the impact handwheel, operate with normal speed and normal force;

          8. The gland bolts should be tightened evenly and symmetrically. The gap between the gland and the stem is too small, and the gap should be increased appropriately; the gap between the gland and the stem is too large and should be replaced.

          The above information is provided by self contained check valves.



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            vidno vsem

            Kitchen cleaning powder safe and effective Range Hood cleaner powder

            Product Description

            Type:Detergent                                               Detergent Type:Cleaner

            Detergent Use:  Kitchen                                  Shape:Powder

            Feature:Disposable, Eco-Friendly                   Place of Origin: Hebei, China

            Brand Name:Sida                                            Model Number:250g

            Use: kitchen cleaning                                      Function: Remove Stains

            Services:OEM                                                   Origin: Hebei china supplier

            Oil Removal Cleaner:The decontaminate effect is great excellent, it can deal with any grease,stubborn stains,and good smelling,kind to hand.

            We provide you with  best quality and  the favorite price. Welcome to inquiry

            Strong removes stubborn greases from kitchen utensils, like dishes, pots, pans, range hood ,etc.

            The scale is harmful, and the descaling and replacement health

            Stubborn Stains Removal Cleaner Features:

            This product uses active oxygen factor, mild and non-irritating and does not hurt the hand. It is suitable for refrigerator interior, pot lid, cooktop, oil pan, oil rag, oil brush, oil plate stain, bathroom glue stain and so on. This product is safe to use, harmless to the human body and environmentally friendly.

            Oem Kitchen Cleaner Powder Instructions:

            Put the product and the rag in the basin at the same time, pour hot water (this will release a lot of gas, which is a normal phenomenon), and then use a rag to clean the glue stain on the kitchen utensils. 2. Key adhesive stains, can be directly rubbed with this product with a semi-dry cloth. Adhesive stains on the ground can be directly sprinkled on the product, then rinse off with hot water. 3. If there is any sticky stain on the sewer, you can pour the product into it and then use boiling water for about 1 hour to dredge.

            Handan sida detergent factory has been engaged in household washing products for 20 years since 1996.The main business livelihood inseparable from the daily chemical products, the product range covers "fabric washing, protection, elimination,Household cleaning, fresh air, hair care, "Eco-Friendly Detergent, 360 Detergent Scale, kitchen cleaning powder, Oil removal clean powder, Stubborn Stains Removal Cleaner, High Foam Washing Powder, Biological Washing Powder, Oem Cleaning Paste, Xiaoqiang's Father Cleaning Paste.


            Komentarji

               
              vidno vsem

              Household detergent powder and Scale cleaner

              Handan sida detergent factory has been engaged in household washing products for 20 years since 1996.The main business livelihood inseparable from the daily chemical products, the product range covers "fabric washing, protection, elimination,Household cleaning, fresh air, hair care, "Eco-Friendly Detergent, 360 Detergent Scale, kitchen cleaning powder, Oil removal clean powder, Stubborn Stains Removal Cleaner, High Foam Washing Powder, Biological Washing Powder, Oem Cleaning Paste, Xiaoqiang's Father Cleaning Paste.

              Product Description

              Type:Detergent                                    Detergent Type:Cleaner

              Shape:Powder                                     Feature:Disposable, Eco-Friendly  

              Place of Origin: Hebei, China              Brand Name:Sida   

              Model Number:200g                            Function: Scale cleaner

              Services:OEM                                     Origin: Hebei china supplier

              Detergent Scale Product Features

              Dissolves water scale from kettle, water dispenser and boilers in hard to reach places;

              Enhances efficiency of water boiler and save energy;

              Ingredients are food-grade and non-toxic so it is safe to use.

              The scale is harmful, and the descaling and replacement health

              Quick Descaling Detergent Product features: This product is suitable for wading containers in households, hotels and public,places,humidifiers, kettles, water heaters, water dispensers, etc. It contains funny scale components, has quick descaling, good effect, easy to use, and is harmless to the human body. It has no corrosion to metals and rubber.

              Oem Detergent Powder Usage: This product can be descaled with ten times of tap water. The water temperature effect is better at around 40 °C. It can be removed by directly soaking heavy scale and hard scale (such as scale) for about 1 hour, cleaning light scale (such as tea scale, Urine scale) directly rinse, wipe, after washing, the remaining liquid can also be poured into the bathroom to eliminate odor.


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                Slika od Alice Lu
                od Alice Lu - sreda, 8. julij 2020, 08:37
                vidno vsem
                Check valves are probably the most misunderstood valves in history. If you mention check valves to most factory personnel, the typical response is "they don't work." In fact, these people are likely to have removed internal components or reinstalled system piping to avoid check valves. The check valve allows one-way flow and automatically prevents back flow (reverse flow) when the fluid in the pipeline reverses flow. They are one of the few automatic valves that do not require auxiliary opening and closing. Unlike other valves, even if the power plant facility loses air, electricity, or someone who may manually circulate the valve, the valve can continue to work. Check valves are everywhere, including at home. If you have a sewage pump in the basement, there may be a check valve on the pump discharge line. Outside the home, they can be found in almost every industry where pumps are located. Like other valves, check valves can also be used for various media: liquids, air, other gases, steam, condensate, and in some cases, liquids with fine particles or mud. Applications include pump and compressor discharge, headers, vacuum circuit breakers, steam lines, condensation lines, chemical feed pumps, cooling towers, loading racks, nitrogen purge lines, boilers, HVAC systems, utilities, pressure pumps, sewage Pumps, flushing stations, and spray lines. Check Valves How they operate Check valves are sensitive to flow and rely on pipeline fluid to open and close. The internal flap allows fluid to flow forward, thereby opening the valve. The disc starts to close the valve because the forward flow decreases or reverses, depending on the design. The structure is usually very simple, with only a few parts, such as the valve body, valve seat, valve flap, and valve cover. Depending on the design, there may be other items such as valve stems, hinge pins, clapper arms, springs, balls, elastomers, and bearings. The internal sealing of the check valve disc and valve seat depends on the fluid back pressure, not the mechanical force used to open and close the valve. Therefore, the allowable valve seat leakage rate of the check valve is greater than that of the on-off valve. Metal sealing surfaces usually allow some leakage, while elastomers, such as nitrile rubber and fluoroelastomer, provide airtight closure (zero leakage). Therefore, elastomers should be considered for chemically compatible air/gas media and low-pressure seals. The above information is provided by the check valve supplier.

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                  vidno vsem

                  China Harmless Eliminate Odor Cleaner Urine Scale Cleaner

                  Handan sida detergent factory has been engaged in household washing products for 20 years since 1996.The main business livelihood inseparable from the daily chemical products, the product range covers "fabric washing, protection, elimination,Household cleaning, fresh air, hair care, "Eco-Friendly Detergent, 360 Detergent Scale, kitchen cleaning powder, Oil removal clean powder, Stubborn Stains Removal Cleaner, High Foam Washing Powder, Biological Washing Powder, Oem Cleaning Paste, Xiaoqiang's Father Cleaning Paste.

                  Product Description

                  Type:Detergent                                    Detergent Type:Cleaner

                  Shape:Powder                                     Feature:Disposable, Eco-Friendly  

                  Place of Origin: Hebei, China              Brand Name:Sida   

                  Model Number:200g                            Function: Scale cleaner

                  Services:OEM                                     Origin: Hebei china supplier

                  Urine Scale Detergent Product Features

                  Dissolves water scale from kettle, water dispenser and boilers in hard to reach places;

                  Enhances efficiency of water boiler and save energy;

                  Ingredients are food-grade and non-toxic so it is safe to use.

                  The scale is harmful, and the descaling and replacement health

                  Eliminate Odor Cleaner Product features: This product is suitable for wading containers in households, hotels and public,places,humidifiers, kettles, water heaters, water dispensers, etc. It contains funny scale components, has quick descaling, good effect, easy to use, and is harmless to the human body. It has no corrosion to metals and rubber.

                  Oem Water Scale Cleaner Usage: This product can be descaled with ten times of tap water. The water temperature effect is better at around 40 °C. It can be removed by directly soaking heavy scale and hard scale (such as scale) for about 1 hour, cleaning light scale (such as tea scale, Urine scale) directly rinse, wipe, after washing, the remaining liquid can also be poured into the bathroom to eliminate odor.


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                    vidno vsem

                    OEM Tea Scale Detergent Harmless Quick Descaling Cleaner

                    Handan sida detergent factory has been engaged in household washing products for 20 years since 1996.The main business livelihood inseparable from the daily chemical products, the product range covers "fabric washing, protection, elimination,Household cleaning, fresh air, hair care, "Eco-Friendly Detergent, 360 Detergent Scale, kitchen cleaning powder, Oil removal clean powder, Stubborn Stains Removal Cleaner, High Foam Washing Powder, Biological Washing Powder, Oem Cleaning Paste, Xiaoqiang's Father Cleaning Paste.

                    Product Description

                    Type:Detergent                                    Detergent Type:Cleaner

                    Shape:Powder                                     Feature:Disposable, Eco-Friendly  

                    Place of Origin: Hebei, China              Brand Name:Sida   

                    Model Number:200g                            Function: Scale cleaner

                    Services:OEM                                     Origin: Hebei china supplier

                    Non-Toxic Detergent Product Features

                    Dissolves water scale from kettle, water dispenser and boilers in hard to reach places;

                    Enhances efficiency of water boiler and save energy;

                    Ingredients are food-grade and non-toxic so it is safe to use.

                    The scale is harmful, and the descaling and replacement health

                    Quick Descaling Cleaner Product features: This product is suitable for wading containers in households, hotels and public,places,humidifiers, kettles, water heaters, water dispensers, etc. It contains funny scale components, has quick descaling, good effect, easy to use, and is harmless to the human body. It has no corrosion to metals and rubber.

                    Tea Scale Detergent Usage: This product can be descaled with ten times of tap water. The water temperature effect is better at around 40 °C. It can be removed by directly soaking heavy scale and hard scale (such as scale) for about 1 hour, cleaning light scale (such as tea scale, Urine scale) directly rinse, wipe, after washing, the remaining liquid can also be poured into the bathroom to eliminate odor.


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