AHN42F parallel safety reflux valve is a special valve that integrates safety relief and check functions, designed specifically for pump outlet pipelines and pressure systems that require prevention of medium backflow. It adopts a parallel valve disc structure, and the valve disc moves parallel to the fluid channel inside the valve body, with smooth opening and closing. When the system pressure exceeds the set safe value, the valve opens as a safety valve to release pressure; When the pump stops or the downstream pressure is higher than the upstream, the valve acts as a check valve and automatically closes to prevent the medium from flowing back. The sealing surface is directly processed from the valve body material ("F" type), which is economical and durable. This valve is dual-use, simplifying pipeline design and providing integrated safety protection and hydraulic control for pumps and pressure systems. Mainly installed in the outlet pipeline of centrifugal pumps, water supply systems, fire pump sets, industrial circulating water systems, petrochemical plants, and boiler feedwater systems. Used to prevent system overpressure, avoid backflow and water hammer hazards during pump shutdown, and prevent medium backflow from causing damage to the pump, it is a commonly used multifunctional protective valve in pump pipelines.

AHN42F Parallel Type Safety Check Valve Product Diagram

1. Dual function of safety pressure relief and check

Integrated safety valve and check valve. Automatically activate the relief protection system when overpressure occurs; Automatically shut off when the pump stops or the back pressure increases to prevent medium backflow and water hammer hazards.

2. Parallel valve disc structure

The valve disc moves parallel to the fluid channel, with smooth opening and closing, low flow resistance, uniform wear of the sealing pair, and long service life.

3. Valve body sealing surface ("F" type)

The sealing surface is directly processed or welded from the valve body material, which is economical, practical, wear-resistant, and suitable for non corrosive media such as water and oil.

4. Spring loaded, reliable action

Adopting a spring direct load mechanism, it provides stable opening pressure and check closing force, with sensitive and reliable action.

5. Compact structure, simplified pipeline

One valve achieves two functions, reducing the number of valves and installation space required on the pipeline, and lowering system costs.

6. Widely applicable media

The valve body material can be selected from carbon steel, stainless steel, etc., suitable for various media such as water, oil, steam, etc.

AHN42F Parallel Type Safety Check Valve Structural Diagram

Part Name Material

Performance Specifications Table

The flange standards for the inlet and outlet of the safety valve are specified as follows (Mpa):

The inlet and outlet diameters are specified as follows:

AHN42F Parallel Type Safety Check Valve Outline Drawing

Dimension Chart