Features and Benefits

• Hydraulically powered valve seal design
  - Reliable drip tight sealing
  - Eliminates jamming problems
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• Hydro-efficient body design
  - Wide operating range
  - Unobstructed straight through flow path
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• Double-chambered unitized actuator
  - Easy, inline inspection ensures minimal down time
  - Quick and smooth valve action

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Optional Features

• Large control filter (code: F)
• Seawater service construction

Note: Optional features can be mixed and matched. Contact us for more information.

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Typical Applications

• Pressure relief for individual diesel fire pumps
• Pump station pressure relief
• Centralized thermal pressure relief
• Foam recirculation; maintains required foam pressure
• Zone safety relief

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Operation

The BERMAD Model FP 730-UF remains closed as long as the sensed inlet pressure is lower than the adjustable set point. When the Pressure Relief Pilot [1] senses inlet pressure [2] that is higher than the pilot setting, it opens releasing water pressure from the control chamber [3] causing the main valve to modulate open, relieveing excess pressure to either a reservoir or sump, preventing system overpressure.

The Pressure Relief Pilot is equipped with an adjusting screw [4] to preset the desired inlet pressure and an integral adjustable needle valve [5] to control the main valve closing speed. The valve’s unique design and quick reaction to system demand keeps pressure loss at a minimum. To further enhance reliability the control system is equipped with a control strainer [6].

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Engineer Specifications

The Pressure Relief Valve shall be UL-Listed, FM-Approved and hydraulic pilot controlled. The main valve shall be an angle or “Y” pattern. All necessary inspection and servicing of the main valve shall be possible in-line.

Valve actuation shall be accomplished by a double chambered actuator, which shall include a stainless steel stem and a flat seal disk creating a drip tight seal.

The valve seat shall be made of stainless steel and have an unobstructed flow path, with no stem guide or supporting ribs.

The pilot system shall be field adjustable, with adjustable valve closing speed, integrated to the pilot valve, hydraulically tested and supplied as an assembly consisting of:

• Relief pilot valve UL-Listed and FM-Approved as part of the assembly with built-in, internal needle valve
• “Y” strainer

The control trim shall be supplied as an assembly, pre-assembled and hydraulically tested at an ISO 9000 and 9001 certified factory.

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Typical Installations

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System Components

1 - BERMAD Model FP 730-UF

2 - Fire Pump

3 - Check Valve

4 - Pressure Gauge

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Installation Considerations

• Valve size should be no less than NFPA-20 requirements
• Provide adequate clearance around valve for maintenance, ensuring that the actuator can be easily removed
• Design installation with the valve cover up for best performance
• Ensure that before the valve is installed, instructions are given to flush the pipeline at full flow

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UL Listed

The BERMAD Model FP 730-UF is UL-Listed and FM-Approved when installed as a unit

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Technical Data

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Connection Standard

• Grooved: ANSI/AWWA C606 for 2, 3, 4, 6 & 8”
• Flanged: ANSI B16.42 (Ductile Iron), B16.5 (Steel & Stainless Steel), B16.24 (Bronze), ISO PN16
• Threaded: NPT or ISO-7-Rp 2, 2½ & 3”

Water Temperature

• 0.5 - 80°C (33 - 180°F)

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Sizes (“Y” & Angle)

• Available Y: 1½ - 20”
• Angle: 1½ – 18”
• 24-36” Globe
• UL-Listed: 2, 2½, 3, 4, 6 & 8”

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Pressure Rating

• UL-Listed 2 - 6”: 350 psi (24 bar) 8”: 175 psi (12 bar)
• ANSI#150 235 psi/16 bar (code A5)
• ANSI#300 350/24 bar (code A3)
• ISO 16 235 psi/16 bar (code 16)
• ISO 25 350/24 bar (code 25)
• Grooved 235psi/PN16, ANSI C606 (code V1)
• Grooved 365psi/PN25, ANSI C606 (code V2)
• Threaded 235psi/PN16, ISO-7-Rp (code BP)
• Threaded 365psi/PN25, ISO-7-Rp (code BH)
• Threaded 235psi/PN16, NPT (code NP)
• Threaded 365psi/PN25, NPT (code NH)

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Pressure Settings Range

• Class #150: 30 – 235 psi (2 – 16 bar)
• Class #300: 100 – 350 psi (7 – 24 bar)

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Manufacturers Standard Materials

Main valve body and cover

• Ductile Iron ASTM A-536
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Main valve internals

• Stainless Steel, Bronze and coated Steel
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Control Trim System

• Brass control components/accessories
• Forged Brass fittings & Copper tubing
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Elastomers

• NBR (Buna-N)

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Coating

• Electrostatic Powder Coating Polyester, Red (RAL 3002)

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Optional Materials

Main valve body/internals

• Carbon Steel ASTM A-216-WCB
• Stainless Steel 316
• Ni-Al-Bronze ASTM B-148
• Titanium
• Duplex
• Hastalloy
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Control Trim

• Stainless Steel 316
• Monel® and Al-Bronze
• Hastalloy C-276
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Coating

• High Build Epoxy Fusion-Bonded with UV Protection, Anti-Corrosion
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Approvals

• UL Listed - Fire Pump Relief Valve (QXZQ)
• FM Approved - Water Relief Valve and Fire Pump Relief Valve
• ISO 9001 QA certified
• ABS - Type Approved
• Lloyd’s Register - Type Approved

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