Product Details

Basic Information of Fire Protection Pressure Reducing Valve

It adjusts and controls the outlet pressure of the main valve to enable the outlet pressure of the main valve not vary with inlet pressure, enable the outlet flow rate of the main valve not to vary with its outlet flow rate. Dof960 series of cases

Features of Fire Protection Pressure Reducing Valve

1. Sensitive and accurate pressure control
2. Adjustable static pressure and dynamic pressure
3. Meets National Lead Reduction Mandate
4. Fire Protection System

Principle of Pressure Reducing Valves for Fire Protection Service

When water flows through the valve, water flows into the main valve control chamber through the needle valve, and the outlet pressure is imposed on the pilot valve through the guide duct. When outlet pressure is higher than the set pressure of the pilot valve, the outlet pressure does not rise any more; when the outlet pressure of the valve reduces to the set pressure of the pilot valve, the pilot valve opens, water is discharged out of the control chamber. Because the water discharged from the pilot valve system is more than the water inflow, the pressure in main valve control chamber reduces. The inlet pressure forces the main valve open. In a stable state, the water inflow and discharged water of the control chamber are equal. The opening of the main valve keeps constant, with stable outlet pressure.

Installation and Commissioning of Fire Protection Pressure Reducing Valve

For operation, adjustment and maintenance convenience, the pressure reducing valve is typically installed on a horizontal pipe along with a backup pressure reducing valve group. Every grade of spring of the fire pressure reducing valve can only apply in a certain range of outlet pressure, and outlet pressure can be set only by adjusting the spring of pilot valve. For specific use, please consult ZECO Valve Group.

Part	Material	Standard
Body	Ductile Iron	EN 1563/DIN 1693
Bonnet	Ductile Iron	EN 1563/DIN 1693
Trim	Stainless Steel 431	EN10088-1/ASTM A959
Seat	Stainless Steel 431	EN10088-1/ASTM A959
Diaphragm	EPDM / NBR	ISO 4633
Pilot Valve	CuZn39Pb1 / C37000	EN12167/ASTM B135
For the materials options not listed, consult factory. ZECO manufactures valves in more than 50 different alloys.

Product scope, Standards & Materials of Fire Protection Pressure Reducing Valve

Size Range: 2"~8"
Pressure Rating: 10bar ~ 16bar
Face to Face Dimensions: AMSE B16.10, EN558-1
Flange End Dimension: AMSE B16.1/16.42, AS4087, EN1092-2
Coating: Fusion Bonded Epoxy Coating
Inspection and Test: GB50261-2005

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