Product overview
The VPB pneumatic butterfly valve is a pneumatic valve for realizing the enabling action with circular butterfly plate rotating with valve rod for opening/closing, mainly used as block valve, can be designed to be of regulating or segment valve and regulating function, and is usually used on the low-pressure medium and large-caliber pipelines. There are two seal styles (including elastic seal and metal seal). As for the elastic seal valve, the seal ring can be mounted on the valve body or attached to the butterfly plate periphery.
Product features
● Small and portable, easy dismantling and repair and installation in any position;
● Simple and compact structure, small operating torque and quick 90° rotation enabling;
● The flow characteristics tend to be linear with good regulation performance;
● The connection between butterfly plate and valve rod is subject to structure without pin, overcoming the possible internal leakage point;
● The butterfly plate excircle is of spherical shape, improving the sealing property and prolonging the service life of the valve;
● Keeping zero leakage at the moment of opening and closing under pressure for more than 0.05 million times;
● The sealing element is replaceable and sealed reliably with two-way sealing;
● The butterfly plate can be sprayed with coating (such as nylon or PTFE) as per user requirements;
● The valve can be designed to be of flange connection and butt clamp connection;
Butterfly valve parameter
Nominal diameter DN(mm) | DN50～1000mm |
Nominal pressure (MPa) | PN1.0, 1.6 and 2.5MPa |
Valve form | Straight in cast valve body |
Connection type | Flange type and butt clamp type |
Valve element form | Butterfly plate type |
Gland packing | Flexible graphite and PTFE |
Intrinsic error | With locator: Less than ±2% of total travel |
Return difference | With locator: Less than ±2% of total travel |
Control mode | Switch type (switch two-step control) and regulating type (4～20mA control) |
Actuator parameter
Actuator model | Single and double acting on pneumatic actuator by PHR/PHW series |
Gas supply pressure | 0.4～0.7MPa |
Air source port | G1/4", G1/8", G3/8" and G1/2" |
Ambient temperature | -30～+70℃ |
Acting form | Single acting actuator: Air-to-close type (B)--the valve is opened when gas leakage (FO); Air-to-open type (K)--the valve is closed when gas leakage (FC) Double-acting actuator: Air-to-close type (B)--the valve is kept when gas leakage (FL); Air-to-open type (K)--the valve is kept when gas leakage (FL) |
Accessories available | Locator, solenoid valve, air filtering pressure reducer, lock-up valve, travel switch, valve position transmitter and handwheel |
Butterfly valve material
Part name | Main materials |
Valve body | Spheroidal graphite steel, cast steel, alloy steel and stainless steel |
Butterfly plate | Gray pig iron, spheroidal graphite steel, cast steel, stainless steel and special material |
Sealing ring | Various rubbers and PTFE |
Valve rod | 2Cr13 and stainless steel |
Packing | O-ring and flexible graphite O |
Performance specification
Nominal diameter | DN (mm) | 50～1000 | ||
Nominal pressure | PN (MPa) | 0.6 | 1.0 | 1.6 |
Test pressure | Strength test | 0.9 | 1.5 | 2.4 |
Sealing test | 0.66 | 1.1 | 1.76 | |
Air seal test | 0.6 | 0.6 | 0.6 | |
Applicable medium | Air, water, sewage, steam, gas and oil. | |||
Drive form | Pneumatic drive | |||
Design standard
Design standard | GB/T12238-1989 |
Flange connecting size | GB/T9113.1-2000; GB/T9115.1-2000; JB78 |
Structure length | GB/T12221-1989 |
Pressure test | GB/T13927-2000; JB/T9092-1999 |
Sealing material and applicable temperature
Description of materials | Chloroprene rubber | Buna-N rubber | Ethylene propylene rubber | Polytetrafluoroethylene | Silicone rubber | Fluororubber | Natural rubber | Nylon |
English abbreviation | CR | NBR | EPDM | PTFE | SI | VITON | NR | PA |
Model and code | X or J | XA or JA | XB or JB | F, XC or JC | XD or JD | XE or JE | X1 | N |
Higher temperature resistance | 82℃ | 93℃ | 150℃ | 232℃ | 250℃ | 204℃ | 85℃ | 93℃ |
Lower temperature resistance | -40℃ | -40℃ | -40℃ | -268℃ | -70℃ | -23℃ | -20℃ | -73℃ |
Applicable operating temperature | 0~+80℃ | -20~+82℃ | -40~+125℃ | -30~+150℃ | -70~+150℃ | -23~+150℃ | -20~+85℃ | -30~+93℃ |
Butterfly valve model selection
VPB | Pneumatic butterfly valve | ||||||
Valve classification R Butt clamp centerline soft seal butterfly valve X Support lug centerline soft seal butterfly valve V Flange centerline soft seal butterfly valve S Butt clamp triple eccentric metal rigidity seal butterfly valve M Flange triple eccentric metal rigidity seal butterfly valve | |||||||
Nominal diameter *** (100 indicates nominal diameter DN100 or inch used to express 4＂) | |||||||
Valve body material C Cast iron D Ductile iron W A216-WCB valve 0 CF8/304SS 1 CF8M/316SS | |||||||
Valve plate material W A216-WCB A Aluminium bronze 0 CF8/304SS 1 CF8M/316SS 2 CF3M/316L 3 Dual-phase steel 5 Other material | |||||||
Valve rod material W 45＃steel S 1Cr13 or 2Cr13 H 17-4H stainless steel 0 304SS 1 316SS | |||||||
Valve seat material P PTFE E EPDM N NBR V VITON | |||||||
Nominal pressure *** (16 indicates nominal pressure PN1.6Mpa or ANSI used to express 150Ib) | |||||||
VPB- | |||||||
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