Large caliber high-performance hydraulic control valve

大口徑高性能水利控制閥is a high flow control equipment applied in water conservancy engineering, municipal water supply, and industrial systems, with high pressure bearing capacity, precise flow control, and anti water hammer characteristics. The following are the core technical points:

1、 Core parameters and structural characteristics
Nominal diameter
DN300-DN600 (covering mainstream large-diameter requirements), supporting up to DN1200 special customized models.
Pressure level
The standard pressure is 1.0-2.5MPa, and the shell test pressure is 1.5 times the nominal pressure (≥ 3.75MPa).
Structural composition
Component Material/Type Function
Main valve body cast iron/cast steel/stainless steel (WCB, copper alloy) main body pressure and medium channel
Control mechanism piston type (LHS941X) or diaphragm type (600X) to achieve flow/pressure regulation
The electromagnetic pilot valve (600X) or hydraulic balance piston of the pilot valve system receives signals to drive the action of the main valve
Sealing element nitrile rubber/EPDM rubber corrosion-resistant seal (suitable for water temperature of 0-80 ℃)
Auxiliary components needle valve, ball valve, micro filter adjust opening and closing speed and prevent blockage
Data integration from
2、 Core functions and technological advantages
Accurate traffic control
Dynamically adjust the opening of the main valve through a pilot valve system to maintain a constant flow rate (such as the 400X fire life dual system intelligent distribution).
Water hammer protection mechanism
Staged shutdown technology (700X type): When stopping the pump, first close 90% to trigger the pump shutdown signal, and the remaining 10% is sealed by the return water pressure to reduce water hammer impact.
Multi scenario adaptability
Fire protection system: prevent water pump backflow (JD745X piston type multifunctional control valve);
Municipal pipeline network: pressure regulation for high-rise building zoning (600X type);
Industrial systems: remote control for petrochemical and wastewater treatment (supporting AC220V/DC24V power supply).
3、 Selection and installation points
Selection principle
Select the valve body material based on the characteristics of the medium (stainless steel for corrosive media and cast iron for ordinary water bodies);
The fire protection system prioritizes the use of piston structures (such as 700X, JD745X), which are resistant to high pressure and respond faster.
Key installation specifications
It must be installed horizontally, with the valve cover facing upwards and the direction of the valve body arrow aligned with the water flow;
A filter (≥ 80 mesh) should be installed in front of the valve and a drainage outlet should be set up;
Install an automatic exhaust valve at the highest point of the pipeline network to avoid air blockage.
4、 Comparison of mainstream models
Core application characteristics of model control method
LHS941X electric piston flow regulating reservoir drainage/large flow pressure regulating suitable for DN600 and above ultra large caliber
400X hydraulic automatic fire protection - domestic water supply parallel system without external power supply, constant flow rate
700X electromagnetic pilot valve+hydraulic stage closing water pump outlet protection waterproof hammer has significant effect
600X electromagnetic pilot valve remote control high-rise building water supply network response speed ≤ 3 seconds