worm gear opeared wafer butterfly valve

详情

Size Range: 2~*0"(DN*0~DN***0）

Pressure: PN*0, PN*6, Class**5

Body Materials: Cast Iron, Ductile Iron, WCB , Stainless Steel, Bronze

Seat Materials: NBR, EPDM, VITON, PTFE

Disc Materials: Ductile Iron, WCB, CF8,CF8M, Al-bronze C**8

Stem Materials: SS**6, SS**4, SS**6

Adoptive Standards:

Valve Design: API **9, MSS SP**7

Face To Face: API **9, MSS SP**7, DIN***2, BS EN****1

Pressure Test: API **8

Flange Drilling: ANSI B*6.1 class**5, BS***4 PN*0/PN*6, DIN***1 PN*0/PN*6

Top Flange: ISO***1

Features:

Single Eccentric Disc-Shaft

Anti-Blow Out Stem

Bi-Directional

Fire safe Design

Low Friction Body Seat

Zero Leakage

Standard Test :

Body Test: 1.5 times the working pressure with water. This test is performed after valve assembly and with disc in half position open, it is called as a body hydro test.

Seat Test: 1.1 times the working pressure with water.

Function / Operation Test: At the time of final inspection, each valve and its actuator (Flow-Control Lever / Gear / Pneumatic Actuator), under goes a complete operating test (Open/Close). This test carried out without pressure and at ambient temperature. It ensures the correct operation of the valve / actuator assembly with accessories such as solenoid valve, limit switches, air filter regulator etc.

Special Test: On request, any other test can be carried out according to special instruction by client.