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Polovo Valves (Shanghai) Co., Ltd.
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High performance stainless steel wafer eccentric butterfly valve
Technical Parameters:
Pneumatic actuator | Double acting,single acting |
Pneumatic accessories | Limit switch,positioner,solenoid valve,filter relief-pressure valve, hand wheel-operated. |
Nominal diameter | DN50-DN1000mm |
Nominal pressure | 1.0-6.4MPa |
Applicable temperature | Hard seal: -30~425°C |
Connection | Flange, wafer |
Body material | Ductile iron, Cast iron, WCB, SS304,SS316,SS316L |
Disc material | 304,316,316L |
Seat lining | Hard seal |
Applicable medium | Gas,water and oil etc |
Outline size drawing:
Type specification table:
Diameter (mm) | Inch | Size (mm) | ||||
L | D1 | D2 | H1 | H2 | ||
50 | 2 | 43 | 52.6 | 125 | 142 | 80 |
65 | 2 1/2 | 46 | 64.4 | 145 | 155 | 89 |
80 | 3 | 46 | 78.9 | 160 | 161 | 95 |
100 | 4 | 52 | 104.1 | 180 | 180 | 114 |
125 | 5 | 56 | 123.4 | 210 | 193 | 127 |
150 | 6 | 56 | 155.9 | 240 | 205 | 139 |
200 | 8 | 60 | 202.8 | 295 | 250 | 175 |
250 | 10 | 68 | 250.8 | 350 | 282 | 203 |
300 | 12 | 78 | 301.9 | 400 | 326 | 242 |
350 | 14 | 78 | 334 | 460 | 358 | 267 |
400 | 16 | 102/88 | 390 | 515 | 380 | 301 |
450 | 18 | 114/107 | 441 | 565 | 422 | 381 |
500 | 20 | 127 | 492 | 620 | 479 | 387 |
600 | 24 | 154 | 593 | 725 | 562 | 457 |
Double acting pneumatic actuator work principle artwork
When air pressure from the port (2) into two piston cylinder between central cavity, make the two
ends to the cylinder piston separation direction, both end air cavity air through the port (4) discharge,and at the same time, make the two piston rack synchronous drive the output shaft (gear) counter-clockwise. And air pressure from the port (4) into the cylinder ends air cavity, two pistons to cylinderintermediate direction, and the middle gas cavity air through the port (2) discharge, and at the same time, make the two piston rack synchronous drive the output shaft (gear) clockwise.
(if the piston relative inverse direction installation, output shaft that into reverse rotation).
Related Pictures for your reference:
Polovo valves (Shanghai) Co., Ltd
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Mobile: + 1590 1763 564 (Thank you and have a nice day)