RV-1

The TYCO Model RV-1 Pressure Relief Valves, 2 through 8 inch (DN50 through DN200), are factory assembled and fully trimmed valve arrangements for relief of excess water pressure. These valves are typically used to automatically relieve excess pressure in a fire protection system that utilizes a fire pump. Pilot-controlled, the Model RV-1 Valve maintains a relatively constant system pressure at the pump discharge as flow demands change.

The Model RV-1 Pressure Relief Valve may be field-set to a nominal relief “set pressure” of 30 to 250 psi (2,1 to 17,2 bar).Features are as follows:
• Globe or angle pattern
• Installation in any orientation
• One-piece, one-moving-part diaphragm
• Ceramic enamel-coated interior
• Standard nylon-coated exterior
• Accurate pressure control
• In-line service
• No need to bleed trapped air from the diaphragm chamber
• One pilot valve sub-assembly that provides for any outlet “set pressure”; that is; 30 to 250 psi (2,1 to 17,2 bar)

Approvals
UL Listed; FM Approved

Maximum Inlet Pressure 250 psi (17,2 bar)

Temperature Range
50°F to 175°F (10°C to 80°C)
Field Relief “Set Pressure” Range 30 to 250 psi (2,1 to 17,2 bar)
NFPA 20 Recommended

Maximum Flow
• 2 Inch (DN50): 250 GPM (946 LPM)
• 3 Inch (DN80): 500 GPM (1893 LPM)
• 4 Inch (DN100): 1000 GPM (3785 LPM)
• 6 Inch (DN150): 2500 GPM (9462 LPM)
• 8 Inch (DN200): 5000 GPM (18925 LPM)
Refer also to Figure 4 for inlet pressure versus flow characteristics.

End Connections
Threaded end connections are available as NPT threaded or threaded per ISO 7/1. Flanged end connections are available as drilled per Table A.
Construction (Figure 2)

• Body:
Rilsan1 blue-coated ductile iron per ASTM A536-77, Grade 65-4512

• Diaphragm Cover:
Rilsan blue-coated ductile iron per ASTM A53677, Grade 65-45-12

• Diaphragm:
Nylon fabric-reinforced, natural rubber per ASTM D2000

• Diaphragm Cover Fasteners:
Galvanized carbon steel

• Pilot Valve:
Cast bronze and stainless steel with nylon fabric reinforced, natural rubber per ASTM D2000 diaphragm

• Pressure Gauges:
2-1/2 inch (65 mm) diameter, stainless steel case, 0 to 350 psi (25 bar).

• Strainer, Tube,
Fittings, and Needle Valve: Stainless steel