JLH Three-in-One Check Valve (Multi-functional Control Valve) is manufactured by Yongjia Junzheng Valve Co., Ltd., Shanghai Kailike Valve Co., Ltd., and other companies, utilizing Y-type diaphragm structure and non-metallic sealing components, integrating three functions: cut-off, check, and throttle.

Core Functions

Check Valve Function: Rapid closure of the valve disc driven by a spring prevents backflow and water hammer impact, with silent shutdown and minimal head loss.

Cut-off Function: The valve stem can perform the on/off function of a conventional cut-off valve, completely blocking fluid flow.

Flow Regulation: Equipped with an opening indicator, the pump output is controlled by adjusting the valve rod opening.

Applicable scenarios

Building Supply and Drainage System

HVAC piping

Boiler condensate and secondary water supply pipelines

Anti-reverse valve scenario at pump outlet

Technical Specifications

Pipe Diameter Range: DN50 - DN1000

Pressure Class: 1.0 MPa - 2.5 MPa

Material: Cast Iron, Cast Steel, and Stainless Steel

‌Temperature Range: -29℃ to +80℃

Installation Method: Horizontal or Vertical Installation

Structural characteristics

The valve disc is sealed with nitrile rubber, offering excellent sealing performance and shock absorption.

Springs are made of stainless steel, offering excellent corrosion resistance.

Streamlined design with low pressure drop and bypass function (for supplementary water intake or drainage of accumulated water).