Consolidated Type 2700 Safety Valve0 pages

GE Oil & Gas

Consolidated* Products
2700 Series Safety Valve
Overview
GE's Consolidated Type 2700 safety valve is designed to meet the
needs of the combined cycle gas turbine (CCGT) segment.

Specifications
INLET SIZESt
1.5” (38 mm) through 6”
(152 mm) in either flanged or weld
neck design
INLET RATINGSt

ASME Class 600, 900 and 1500

OUTLET SIZESt

3” (76 mm) through 8” (203 mm) flanged

OUTLET RATINGSt

ASME Class 150 and 300

ORIFICE SIZESt

Seven sizes: 1 through Q

TEMPERATURE RANGEt

-20°F (-28.9°C) to 1050°F (565.6°C)

MATERIALSt
Alloy and carbon steel cast body
with stainless steel trim (standard)
special alloys are available for specific
applications
BLOWDOWNt

4 percent

BACK PRESSURE LIMITt

25 percent of set pressure

Valve Operation
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).

Figure 2: Full Lift

Figure 1: Closed

O

G

R

H

M

J

T

fact sheet