Consolidated 2700 Series Safety Valve
GE’s Consolidated Type 2700 safety valve is designed to meet the needs of the cobined cycle gas turbine (CCGT) segment.
|INLET SIZES||1.5" (38mm) through 6" (152mm) in either flanged of weld neck design|
|INLET RATINGS||ASME CLASS 600, 900 and 1500|
|OUTLET SIZES||3" (76mm) through 8" (203mm) flanged|
|OUTLET RATINGS||ANSI Class 150 and 300|
|ORIFICE SIZES||Seven sizes: 1 through Q|
|TEMPERATURE RANGE||-20°F (-28.9°C) to 1050°F (565.6°C)|
|MATERIALS||Alloy and carbon steel cast body with stainless steel trim<br>(standard) special alloys are available for specific applications|
|BACK PRESSURE LIMIT||25% of set pressure|
- In Figure 1, the upper adjusting ring (G) is positioned to attain full lift at pop and to control the pressure at which the valve will begin to close. The lower adjusting ring (O) ensures a sharp pop action at the set pressure and cushions the valve on closing.
- When full lift is attained (Figure 2), the lift stop (M) rests against the yoke (T) to eliminate rapid opening and closing of the valve, adding stability to the valve. When the valve discharges in an open position, steam is bled into the chamber (H) through two bleed holes (J) in the roof of the disc holder. The steam escapes to the atmosphere through the pipe discharge connection (R).