Data Sheet

Bulletin 71.1:CS200
3
Specications
Available Congurations
Type CS200IN: Basic construction with Internal
pressure registration and Non-Relieving
diaphragm assembly
Type CS200IR: Basic construction with
Internal pressure registration and Relieving
diaphragm assembly
Type CS205IN: Type CS200IN with
Secondary Seat™ Protection
Type CS205IR: Type CS200IR with
Secondary Seat Protection
Type CS206IR: Type CS200IR with
Secondary Seat Protection with bleed to indicate
Secondary Seat is functioning
See also Table 1
Body Sizes, Material, End Connections, and
Pressure Rating
(1)
See Table 2
Inlet Pressure Ratings
(1)
See Table 3
Maximum Outlet Pressure
(1)
Casing: 25 psig / 1.7 bar
To Avoid Internal Parts Damage:
5 psig / 0.34 bar differential above outlet
pressure setting
Operating: 2 psig / 138 mbar
Outlet Pressure Ranges
3.5 inches w.c. to 2 psig / 9 to 138 mbar
Internal Relief Performance
Approximate Internal Relief Start-to-Discharge:
See Table 5
Secondary Seat Approximate Lockup Values:
See Table 6
Relief Performance:
See Figures 7 to 10 and Tables 8, 11, 16, and 21
Flow Capacities
See Tables 7, 9 to 10, 12 to 15, 17 to 20,
and 22 to 33
Flow and IEC Sizing Coefcients
See Table 3
Orice Sizes
See Table 3
Temperature Capabilities
(1)(2)
-20 to 150°F / -29 to 66°C
Spring Case Vent Connection
1 NPT
Body Positions and Spring Case Vent Locations
See Figure 9
Inlet Pressure Tap
1/4 NPT restricted to 0.054 inch / 1.4 mm
Construction Materials
Body: Gray cast iron
Body O-ring: Nitrile (NBR)
Closing Cap: Aluminum
Adjusting Screw: Aluminum
Diaphragm Case, Spring Case,
and Valve Stem: Aluminum
Diaphragm Head: Steel
Orice: Aluminum
Orice with Secondary Seat Protection:
Brass and Nitrile (NBR)
Pusher Post: Aluminum
Diaphragm and Disk: Nitrile (NBR)
Control Spring: Stainless steel or Music wire
Relief Valve Spring: Stainless steel
Relief Valve Spring Retainer: Aluminum
Vent Screen: Stainless steel
Vent Screen Retaining Ring: Zinc-plated steel
Lever Pin: Stainless steel
Spring Seat: Zinc-plated steel
Lever, Other Metal Parts: Steel
Approximate Weight
8 pounds / 4 kg
Designed, Tested, and Evaluated consistent with:
ASME B16, ASME Section VIII DIV I, ASTM B117
(Corrosion Resistance)
1. The pressure/temperature limits in this Bulletin or any applicable standard limitation should not be exceeded.
2. Product has passed Emerson Process Management Regulator Technologies, Inc. (Regulator Technologies), testing for lockup, relief start-to-discharge, and reseal down to -40°.