large adjustable water pressure reducing valve for fire fighting with strainless steel pipe and pilot valve

The valve maintains a preset downstream pressure, regardless of upstream pressure or flow fluctuation. The main valve is controlled by a pilot valve, which makes the main valve modulating to maintain the downstream pressure.
The main valve comprises valve body, diaphragm, stem assembly, and seat. The valve is separated by diaphragm into two chambers, up and down. The upper chamber is control chamber, and down chamber is flow through chamber. The valve stem is driven by diaphragm up and down, and driven force comes from the differential pressure taken by two sides of diaphragm.

The hydraulic control valve series are including: 

100X Handle change ball float

200X First transduction quinonoid formula decompression valve

300X The shuts the noise climination check valve

400X Flow hold valve

500X The leak milks/hold no milk the valve

600X The battery moves the hold valve

700X Water pump hold valve

800X Milk the equilibrium valve of bad beside

LH45X-16 type current limiting check valve

H142X hydraulic pressure water level hold valve

Poly-function water power hold valve

JD745X poly-function water pump hold valve

F745X reniote control ball float

J145X battery moves to control a Distance the valve

AX742X safety the leak milk/hold to mild the valve

YX741X is steady to mild the valve

YX416 valve of adjustable type decompress sion valve comparision type decompression

1. It is light and small in size and easy to disassemble and repair;

2.  It can be turned 90º swiftly when opening and closing, because of its simple and well-knit structure

3.  It can save labour of its short moment of torsion

4.  When flow characteristic curves trend towards direct, the adjustment performance is best

5. Over 10,000 tests of opening and closing prove the longlift of it

6.  It is all-sealed, the leakage of gas test reaches zero

7.  All the parts and materials are stable and endurable.