Data Sheet

Bulletin 71.4:SR8
3
Specications
Body Size, Inlet and Outlet Connection
NPS 1/2, 3/4, 1, 1-1/2, 2 and 3 (DN 15, 20, 25,
40, 50 and 80)
Service Media
All Sizes: Steam, Gas, and Liquid
End Connection
Tri-Clamp
®
Sanitary connections
(5)
Body Pressure/Temperature Ratings
(1)
MAXIMUM
TEMPERATURE,
°F (°C)
MAXIMUM INLET
PRESSURE,
PSIG (bar)
MAXIMUM OUTLET
PRESSURE,
PSIG (bar)
150 (65) 210 (14,5) 210 (14,5)
275 (135) 180 (12,4) 180 (12,4)
400 (204) 160 (11,0) 160 (11,0)
Maximum Operating Pressures
(1)(3)
Set Pressure Ranges
See Table 1
Maximum Differential Pressures
(1)
See Table 1
Temperature Capabilities
(1)
See Table 2
Flow Coefcients
See Table 4
Construction Materials
See Table 3
Pressure Registration
Internal
Pressure Loaded Spring Case Option
Maximum Loading Pressure
NPS 1/2 through 1-1/2 (DN 15 to 40) body:
125 psig (8,6 bar)
NPS 2 and 3 (DN 50 and 80) body:
60 psig (4,1 bar)
1/4 NPT Tapped Vent Connection
Vacuum Protection Option
Maximum Vacuum Pressure
14 psig (1,0 bar) (vacuum)
Certications Available Upon Request
3A
®
certicate (Ethylenepropylene (EPDM) and
316L Stainless steel diaphragms only)
FDA approved elastomers/plastics
Material and Functional Test Certicates
USP Class VI approved elastomers/plastics
(2)
Spring Case Construction
Drilled untapped vent holes (standard)
1/4 NPT for Pressure Load Connection (optional)
Pressure Setting Adjustment
Adjusting screw with Electropolished
Cover (standard)
T-Handle adjusting screw (optional)
Shutoff Classication per ANSI/FCI 70-3-2003
Metal Seat: ANSI Class III
Polytetrauoroethylene (PTFE) Soft Seat:
ANSI Class VI
Polyetheretherketone (PEEK) Soft Seat:
ANSI Class VI (150-400°F)
(4)
Approximate Weight
NPS 1/2 and 3/4 (DN 15 and 20):
9 pounds (4 kg)
NPS 1 and 1-1/2 (DN 25 and 40):
18 pounds (8 kg)
NPS 2 and 3 (DN 50 and 80):
60 pounds (27 kg)
Options
Vacuum protection
Pressure Loaded spring case
T-handle adjusting screw
1. The pressure/temperature limits in this bulletin and any applicable standard or code limitation should not be exceeded.
2. Contact your Local Sales Ofce for details on available constructions.
3. Maximum pressure to prevent damage to internal parts and leakage to atmosphere.
4. Polyetheretherketone (PEEK) Seat meets ANSI Class IV or better below 150°F (66°C).
5. End connection clamps and gaskets to be supplied by the user.
BODY SIZE,
NPS (DN)
MAXIMUM
TEMP, °F (°C)
MAX INLET
PRESSURE,
PSIG (bar)
MAX OUTLET
PRESSURE,
PSIG (bar)
1/2 through
1-1/2
(DN 15
through 40)
150 (65) 210 (14,5) 210 (14,5)
275 (135) 180 (12,4) 180 (12,4)
400 (204) 160 (11,0) 160 (11,0)
2 and 3
(DN 50
and 80)
150 (65) 150 (10,3) 150 (10,3)
275 (135) 125 (8,6) 125 (8,6)
400 (204) 110 (7,6) 110 (7,6)
Tri-Clamp
®
is a mark owned by Tri-Clover, Incorporated.
3-A
®
is a mark owned by 3-A Sanitary Standards, Incorporated.