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| Brand Name: | SONGO |
| MOQ: | 2 pcs |
| Price: | CN¥142.35/pieces 1-29 pieces |
| Payment Terms: | L/C,D/A,D/P,T/T,Western Union |
| Supply Ability: | 30000 Piece/Pieces per Month |
Descriptions And Features Of Manual Wafer butterfly Valve:
The Wafer type Butterfly Valve is a type of full opening and full closing device of the pipeline by rotating the butterfly disc. It is mainly composed of the valve body and a disc-shaped butterfly plate, with the butterfly plate installed in the diameter direction of the pipeline. The butterfly plate can rotate 0° - 90° around its axis. When rotated to 90°, the valve is in the fully open state, with low fluid resistance and good flow control characteristics. This valve has a simple structure, small size, and light weight. It adopts elastic or metal sealing types and is usually installed horizontally in industrial pipelines such as those in the petroleum, chemical, water treatment, and cooling water systems of thermal power stations.
Design Features Of Manual Wafer butterfly Valve:
1. The design is novel and reasonable, with a unique structure, light weight, and quick opening and closing.
2. The operating torque is small, the operation is convenient and labor-saving.
3. It can be installed at any position and is easy to maintain.
4. The sealing components can be replaced, and the sealing performance is reliable, achieving zero leakage in both directions.
5. The sealing material has the characteristics of being resistant to aging and corrosion, and having a long service life.
Part Material Of Manual Wafer butterfly Valve:
| Connect Type | Wafer/flange/lug |
| Working Pressure | PN10/PN16/10K/150LB |
| Brand | SONGO |
| Size | DN50-DN200 |
| Temperature | -23℃+200℃ |
| Medium | Fresh water,sewage, sea water, air, steam, food, medicine, oils, acids, etc. |
| Body | Cast iron, ductile casting iron, stainless steel, carbon steel |
| Disc | Ductile casting iron, stainless steel, lined PTFE |
| Stem | Stainless steel, carbon steel |
| Seat | NBR, EPDM, PTFE |
| Operated | Handle |
Structure Dimension Drawing Of Manual Wafer butterfly Valve:
| Nominal diameter | L | L1 | D1 | H2 | H1 | n-Φd |
bolt n-M |
kgs |
| DN50 | 45 | 250 | 125 | 88 | 64 | 4-Φ18 | 4-M16 | 4 |
| DN65 | 51 | 250 | 145 | 115 | 80 | 4-Φ18 | 4-M16 | 5.8 |
| DN80 | 52 | 250 | 160 | 130 | 85 | 4-Φ18 | 4-M16 | 6.8 |
| DN100 | 58 | 250 | 180 | 150 | 110 | 4-Φ18 | 4-M16 | 7.3 |
| DN125 | 58 | 280 | 210 | 170 | 127 | 4-Φ18 | 4-M16 | 10.3 |
| DN150 | 58 | 280 | 240 | 185 | 140 | 4-Φ22 | 4-M20 | 11.3 |
| DN200 | 65 | 280 | 295 | 215 | 175 | 4-Φ22 | 4-M20 | 14.5 |
Butterfly Valve Operating Type Selection:
Butterfly Valve Connection End Selection:
Butterfly Valve Disc Material Selection:
Butterfly Valve Seat Material Selection:
Seat Material Of Butterfly Valve:
| Material Name |
Description | Operating Temperature |
Service Application |
| PTFE | Virgin PTFE is the most widely used sealing material with excellent characteristics suitable for most services. It has excellent chemical resistance throughout valve industries and low coefficient of frication | -20°F – 400°F -29°C – 205°C |
General chemicals, low pressure services |
| RPTFE | RPTFE (Reinforced PTFE) is typically produced by adding 15% fiber glass to virgin PTFE. It has better pressure-temperature properties than virgin PTFE, better resistance to wear and deformation under load. Not to be used in hydrofluroic acid | -20°F – 400°F -29°C – 205°C |
For low and medium pressure services |
| PCTFE | PCTFE is a homopolymer of chlorotrifluoroethylene, featuring high compressive strength and low deformation under load | -320°F – 248°F -196°C – 120°C |
For low temperature low pressure services |
| Nylon | Nylon is a common seat material for Class 600 valves. It is highly resistance to many chemicals and abrasions, and can be used in air, oil and other gas media. It is not suitable for strong oxidization agents | -20°F – 176°F -29°C – 80°C |
For high pressure, low temperature services |
| PPL | PPL (Polyparaphenylene) is an excellent seat material with low coefficient of friction, highly resistant to pressure and temperature | -50°F – 482°F -46°C – 250°C |
For high temperature low pressure services |
| TFM | TFM (modified PTFE) is a chemically modified PTFE that offers enhanced properties while retaining all the proven advantages of a conventional PTFE | -112°F – 248°F -80°C – 120°C |
For services requiring high purity |
| Metal | Metal (typically stellite) seats are used in severe conditions where flashing, hydraulic shock, abrasive media or trapped metal may exist in the line | -320°F – 1202°F -196°C – 650°C |
For severe services |
O-Ring Material Of Butterfly Valve:
| Material Name |
Description | Operating Temperature |
Operating Pressure |
| NBR | Buna-N (NBR) is an all purpose polymer with good resistance to water, solvents, oil and hydraulic fluids | -50°F – 176°F -46°C – 80°C |
Class 150 – 600 PN 20 – 100 |
| HNBR | HNBR (Hydrogenated NBR) has similar media stability to NBR but with significantly better heat and oxidization stability | -67°F – 337°F -55°C – 170°C |
Class 150 – 600 PN 20 – 100 |
| Viton | Viton (fluorocarbon) is a fluorocarbon elastomer that is compatible with a broad range of chemicals. It performs well in mineral acids, salt solutions, chlorinated hydrocarbons and petroleum oils | -49°F – 320°F -22°C – 204°C |
Class 150 – 600 PN 20 – 100 |
| EPDM | EPDM has good abrasion and tear resistance with excellent chemical resistance to a variety of acids and alkalines. It is susceptible to attack by oil, strong acids and strong alkalines and should not be used in compressed air lines | -50°F – 302°F -46°C – 150°C |
Class 150 – 600 PN 20 – 100 |
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