Product Details

working principle:

As a pressure relief valve: When the pressure relief/pressure-maintaining pilot valve is adjusted to the pressure-relief state, water flows to the outlet through the needle valve, main valve control chamber, ball valve, jade/pressure-maintaining pilot valve, and ball valve. At this time, the main valve is in the open state. . When the inlet pressure exceeds the safety value set by the pressure relief 1 pressure maintaining pilot valve, the pressure relief pilot valve will automatically open and release part of the water through the ball valve to relieve the pressure in the pipeline. When the pressure returns to a safe value, the pressure relief valve automatically closes. When used as a pressure relief valve, each ball valve is normally open.

As a pressure-holding valve: When the pressure-relief 1 pressure-holding pilot valve is adjusted to a pressure-holding state, as long as the main valve inlet water pressure is lower than the pilot valve setting value, the pilot valve will close. The main control chamber is pressurized and the main valve is closed. When the water supply pressure upstream of the main valve exceeds the set pressure of the pilot valve, the pressure-maintaining pilot valve can be opened. The water in the control room is discharged to the outlet through the ball valve. The pressure-reducing main valve in the control room opens and starts water supply, which means the upstream water pressure is maintained. When used as a pressure maintaining valve, the ball valve should be normally closed or replaced with a plug.

Product applications and features:

Function: Control the pressure of the pipeline system, eliminate excess pressure in the pipeline, keep the system pressure at the preset pressure point, and ensure the safe operation of the pipeline system.

Application areas: construction, water treatment, etc.

Features:

1. Opening and closing without friction;

2. Top-mounted structure;

3. Reliable sealing performance;

4. Easy to operate;

5.Wide range of application.

Technical Parameters:

Nominal diameter: DN50-DN600

Nominal pressure: PN16, N25

Applicable temperature: 0°C ~80°C

Applicable medium: clean water

Minimum pressure difference: 0.1MPa

Design standard: JB/T 10674-2006

Test standard: GB/T 13927-2008

Liquid level control height: ≤150mm

Main material

1 Gray cast iron, ductile iron, carbon steel, stainless steel - valve cover

2 spring steel, stainless steel - spring

3 Gray cast iron, ductile iron, carbon steel, stainless steel - diaphragm pressure plate

4 Nitrile nylon reinforced rubber, EPDM nylon reinforced rubber - diaphragm

5 2Cr13 - valve stem

6 Gray cast iron, ductile iron, carbon steel, copper, stainless steel - valve disc

7 butadiene rubber, EPDM rubber - O-ring

8 Gray cast iron, ductile iron, carbon steel, stainless steel - O-ring pressure plate

9 Copper alloy, stainless steel - valve seat

10 Gray cast iron, ductile iron, carbon steel, stainless steel - valve body