Data Sheet

Bulletin 71.1:SR5
4
Specications
Body Size, Inlet and Outlet Connection
1/2 (DN 15), 3/4 (DN 20), 1 (DN 25), and
1-1/2-inch (DN 40) , 2 (DN 50), 3 (DN 80)
Service Media
1/2 (DN 15), 3/4 (DN 20), 1 (DN 25), and
1-1/2 x 1-inch (DN 40 x 25):
Steam, Gas, and Liquid
1-1/2-inch (DN 40) full port:
Steam and Gas only, Liquid not recommended
2 (DN 50) and 3 (DN 80):
Steam, Gas, and Liquid
End Connection
Tri-Clamp ® Sanitary connections
(5)
Body Pressure/Temperature Ratings
(1)
Maximum Operating Pressures
(1)(3)
See Table 1
Outlet Pressure Ranges
See Table 2
Maximum Differential Pressures
(1)
See Table 3
Regulator Temperature Capabilities
(1)
See Table 4
Pressure Registration
Internal
Options
Vacuum protection
Pressure Loaded spring case
T-handle adjusting screw
Pressure Loaded Spring Case Option
Maximum Loading Pressure
Size 1/2 to 1-inch (DN 15 to DN 25) body:
135 psig (9,31 bar)
Size 1-1/2-inch (DN 40) body:
100 psig (6,90 bar)
Size 2 and 3-inch (DN 50 and DN 80) body:
75 psig (5,17 bar)
1/4-inch NPT tapped vent connection
Vacuum Protection Option
Maximum vacuum pressure
14 psig (0,96 bar) vacuum
Certications Available upon Request
3A certicate (EPDM or 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 hole (standard)
1/4 -inch 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
PTFE Soft Seat: ANSI Class VI
PEEK Soft Seat: ANSI Class VI (150-400°F)
(4)
Construction Materials
See Table 5
Flow Coefcients
See Table 6
Approximate Weight
1/2 (DN 15) and 3/4-inch (DN 20): 9 lb (4 kg)
1 (DN 25) and 1-1/2 inch (DN 40): 18 lb (8 kg)
2 (DN 50) and 3 inch (DN 80): 60 lb (27 kg)
1. The pressure/temperature limits in this bulletin and any applicable standard or code limitation should not be exceeded.
2. Contact your Fisher Sales Representative for details on available constructions.
3. Maximum pressure to prevent damage to internal parts and leakage to atmosphere.
4. PEEK Seat meets ANSI Class IV or better below 150°F (65°).
5. End connection clamps and gaskets to be supplied by the user.
MAX TEMP, °F(°C)
MAX INLET,
PSIG (bar)
MAX OUTLET,
PSIG (bar)
150 (65) 210 (14,5) 210 (14,5)
275 (135) 180 (12,4) 180 (12,4)
400 (204) 160 (11) 160 (11)