Grooved End Pressure Reducing Valve
Product Parameters
- Product Model: FIG.F1318
- Valve Type: Pilot Operated Pressure Reducing Valve
- End Connection: Groove × Groove (GR×GR)
- Size Range: DN40~DN300 (1.5″~12″); 1.5″–10″ UL 1739 Listed
- Maximum Upstream Working Pressure: 300 psi / 175 psi (two pressure ratings)
- Downstream Pressure Adjustment Range:
- 15 psi ~ 60 psi
- 35 psi ~ 85 psi
- 65 psi ~ 165 psi
- Groove Standard: AWWA C606
- Surface Treatment: Enamel Paint / Fusion Bonded Epoxy Coating (Interior & Exterior)
- Certification: UL 1739 Listed
- Standard Accessories: Basic Control Valve, Pressure Reducing Pilot, Ejector, Y-Strainer, Tubing/Fittings, Stabilizer
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Product Description
Product Overview
The Grooved End Pressure Reducing Valve (PRV) is a heavy-duty, hydraulically operated diaphragm control valve engineered to automatically reduce high upstream inlet pressure to a constant, stable downstream operating pressure, regardless of flow demand changes or inlet pressure fluctuations.
Featuring standard roll-grooved ends in full compliance with AWWA C606 / ANSI B16.10, this Fire Protection Pressure Reducing Valve eliminates the labor-intensive bolting process required by traditional flanged valves. It integrates seamlessly into grooved fire protection risers, HVAC hydronic networks, and commercial high-rise water distribution piping, offering fast, stress-free installation and effective mechanical vibration absorption.
Key Features & Benefits
Material Specifications
Pilot Assembly Components
Main Dimensions (mm / inch)
Applications
- Fire Sprinkler Systems — Maintains optimal sprinkler operating pressure (UL 1739 approved)
- High-Rise Building Water Supply — Zone pressure control for multi-level distribution
- Municipal Water Networks — Reduces transmission main pressure to distribution-level pressure
- Industrial Process Water — Precise pressure control for cooling circuits and process lines
- Irrigation Systems — Consistent pressure for uniform spray coverage
- Plumbing & HVAC — Boiler feed, cooling tower make-up, and domestic water pressure regulation
Why Choose WEFLO FIG. F1318?
- UL 1739 Certification — Recognized by fire protection authorities globally; simplifies approval with local AHJs.
- FLG×GRV Flexibility — The hybrid end configuration is ideal for mechanical rooms where you need a rigid flanged inlet but prefer grooved field connections for faster installation downstream.
- Zero Minimum Flow — Unlike many competitors, the F1318 regulates accurately even at dead-end or near-zero flow — no bypass valve needed.
- Pilot Serviceability — The bronze pilot assembly is designed for easy field maintenance without removing the main Fire Valve from the line.
- Three Spring Ranges — One valve platform covers 90% of commercial and industrial pressure reducing applications.
Grooved End Pressure Reducing Valve FAQ
Q1: Why choose a Grooved End PRV over a traditional Flanged PRV?
A grooved end connection installs up to 3 to 4 times faster than a traditional flanged connection. It eliminates the need for flange bolt alignment, torqueing multiple bolts, or replacing flange gaskets. Additionally, roll-grooved couplings allow 360-degree rotation during assembly and naturally absorb pipeline vibration, thermal expansion, and seismic stress.
Q2: Is this Grooved PRV approved for automatic fire sprinkler systems?
Yes. Our grooved pressure reducing valves are designed and manufactured in full compliance with UL 1739, FM, and NFPA 13 & 14 standards for fire sprinkler risers, standpipe networks, and deluge systems. (Detailed technical submittals and UL/FM test certificates are available upon request).
Q3: What is the minimum flow rate required for precise valve operation?
Pilot-operated diaphragm valves rely on line pressure differential to operate. While our PRVs function across a wide flow range, extremely low continuous flows (below 1–2% of rated capacity) may cause minor valve hunting or seat chatter. For systems with prolonged near-zero trickle flow, installing a smaller bypass PRV or selecting a low-flow pilot model is recommended.
Q4: Can this Grooved PRV handle high pressure drops without cavitation?
When the differential pressure ratio (inlet vs. outlet) exceeds 3:1, cavitation noise and internal erosion can occur. For extreme pressure reductions (e.g., reducing 250 PSI down to 50 PSI), we recommend installing two PRVs in series (staged pressure reduction) or specifying an optional anti-cavitation stainless steel trim package.
