Relief valve

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Product Description:

1.Technical Date:

Size: DN20-DN800

Nominal Pressure: PN10/PN16/PN25

Operation Temperature: ≤80°C

Suitable Medium: Water

2.Feature

500 x relief valve by the main valve, pressure relief/holding pressure pilot valve, needle valve, ball valve, micro shape filter and pressure gauge of hydraulic control of system. Use of hydraulic automatic operation, can make the pressure release valve and can be used for holding pressure valve. As a pressure relief valve, it can maintain water supply way pressure under the TVC of set; For holding pressure valve, can maintain the main valve upstream water pressure above the set value, maintain the main valve upstream water supply pressure.

500 x relief valve using hydraulic control themselves, do not need other devices and energy, maintenance is simple, one valve is multi-purpose. 500 x relief valve is widely used in water supply network system of high-rise buildings, residential and urban water supply engineering.

1, A pressure relief valve: when the pressure relief/holding pressure pilot valve is adjusted for pressure condition, water through the needle valve, the main valve control room, ball valve, A pressure relief/holding pressure pilot valve, ball valve B of exports, at this time the main valve is fully open. When the inlet pressure exceeds the pressure relief/holding pressure pilot valve set TVC, pressure pilot valve will automatically open, channelled through ball valve C section water, make the line pressure. When the pressure recovery to TVC, pressure relief valve automatically shut down. As a pressure relief valve, ball valve normally open.

2, for holding pressure valve: when the pressure relief/holding pressure pilot valve adjustment of the state, as long as the main valve import water pressure is lower than the pilot valve set point, pilot valve is closed. The main control room booster, the main valve closed.

3, when the main valve upstream water supply pressure exceeds pilot valve set pressure, holding pressure pilot valve to open, the control room of water through the ball valve to the export, the control room main reducing valve open, began to water supply, that maintain the upstream water pressure. For holding pressure valve, ball valve normally closed C or substituted a plug.




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Q:So how does the valve turn on?
The handle of the valve is opened along the pipe and perpendicular to the pipe
Q:What's the meaning of the "single valve"?
There are nuts, plants, flush three parts. The pipeline steel or steel ingot forging molding machine fittings, connection form the socket welding and threaded, socket welding steel pipe is inserted into the socket is in welding, so called "socket joint, thread connection pipe is screwed in the screw through connection.
Q:What kind of industry does valve belong to?
The valve belongs to the equipment of the mechanical pipe, to be exact, belongs to the instrument and meter
Q:What are the most common types of valves?
From the controllable and uncontrollable division (personal opinions, according to our factory valves used to explain)1. hand operated: gate valve, globe valve, ball valve.2. control: single seat valve, two seat valve, ball valve (O ball, V ball), eccentric rotary valve, butterfly valve, diaphragm valve
Q:Valve should be strictly marked according to the direction of instructions and media flow direction to determine the installation direction,
Strength of the corresponding meaning is: the valve used to connect the original way of normal connection, such as silk mouth with the same specifications of the silk mouth connection. You can't connect the wires with different sizes.The pipe clamp is fixed in the counterpart application, from the interface at 200mm was measured with a ruler, when the nominal diameter is less than 100mm, the tolerance of sigma <1mm, when the nominal diameter is greater than 100mm, tolerance for a <2mm, but the length of tolerance is less than 10mm, no strong counterpart or eccentric pad counterpart.
Q:How can the material be checked by valve approach? What experiments do you need?
May refer to the valve pressure test principle and the pressure test matters needing attention.(1) in general, the valve shall not be subject to strength test, but the body and bonnet shall be subjected to strength tests after the repair of the valve body and bonnet or corrosion damage. For the relief valve, the constant pressure and seat return pressure and other tests shall be in accordance with the specifications and the relevant regulations.(2) the installation of the valve should be done for strength and tightness test. Low pressure valve sampling 20%, if not qualified should be 100% of the inspection; medium and high pressure valve should be 100% of the inspection.(3) the installation position of the valve shall be in the direction of easy inspection during the test.(4) welding connection valve, not with blind plate pressure test can be used when the cone seal or O ring seal pressure test.(5) when hydraulic test, the valve air will be excluded as much as possible.(6) the pressure should be increased gradually during the test, and the pressure will not be sudden and sudden.(7) strength test and sealed test duration is generally 2~3min, important and special valves should last 5min. Small caliber valve test time can be a little shorter, large caliber valve test time can be longer. During the test, the test time can be extended if in doubt. Strength test, does not allow the body and bonnet sweating or leakage. Sealing test, the general rotor valve only once, the safety valve, high pressure valve and other raw valve to be carried out two times. When testing for the low pressure, large diameter valve is not important and there are provisions to allow leakage of the valve, allowing a small amount of leakage; the common valve, power station valve, marine valves and other valve requirements vary on leakage requirements according to relevant regulations.
Q:What is the normal temperature on the valve?
What's the valve?. Conventional valves are 425 degreesIf it's on the oil field. It's only 120 degreesAt normal temperatures are below 120 degrees. A lot of valve sealing surface can only reach 120 degrees
Q:Where is the Shandong valve? How about joint valves in Shandong?
To find Shandong valve manufacturers, Shandong better valve manufacturers are in Weifang, find the valve factory is also simple, direct search "Weifang valve" is
Q:What are the production equipment in valve shop?
Gold processing equipment, such as cars, milling, drilling, grinding, slotting machines with little,Special equipment, welding machine, test press, grinding machine, painting line, shot blasting machineAuxiliary equipment, air compressor, grinder,
Q:What does valve J41H-16C mean?
J- stop valve4- flange type connection1- structure typeH- alloy steel seal16- nominal pressure 16 kgC- body carbon steel

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