Y42X Direct-Acting Spring Pressure Reducing Valve

The Y42X Direct-Acting Spring Pressure Reducing Valve is an automatic pressure regulating valve designed based on the force balance principle, adopting direct mechanical linkage between a spring and a diaphragm/piston for pressure control. Its working principle is to directly balance the downstream medium pressure by adjusting the spring's preload. When a change in outlet pressure is detected, the valve core automatically adjusts its opening to maintain stable set pressure. The valve requires no external pilot piping and is driven by the energy of the system medium itself, specifically designed for stable pressure control in medium and low-pressure working conditions. Featuring a flange connection structure, it boasts quick response and a compact design. It is widely used in water supply and drainage systems, HVAC, industrial circulating water, and general fluid pipelines for pressure stabilization and safety protection.

Y42X Direct-acting Spring Pressure Reducing valve Product Image

Y42X Direct-acting Spring Pressure Reducing valve Features

1. Direct-Acting Structure, Quick Response  

Adopts a mechanical structure with direct linkage between the spring and pressure sensing element (diaphragm or piston), requiring no external control source or pilot piping. When downstream pressure changes, the sensing element directly transmits the force to the valve core, achieving rapid response and immediate pressure compensation with stable and reliable dynamic adjustment performance.

2. Compact & Simple Structure, Reliable Operation  

The highly integrated overall structure has fewer moving parts and no complex external hydraulic or pneumatic control circuits, reducing potential failure points. The flange connection facilitates installation and maintenance, making it suitable for use as a compact pressure control device in pipeline systems with limited space.

3. Easy & Intuitive Adjustment, Precise Setting  

A precision pressure adjustment mechanism with a protective cover is installed on the top. By rotating the adjusting screw, the spring preload can be linearly changed to precisely set and lock the outlet pressure value. No special tools are needed for adjustment, and the operation is simple and intuitive, enabling quick on-site commissioning.

4. Built-In Pressure Stabilization, Wide Adaptability  

The valve can automatically maintain stable outlet pressure when inlet pressure fluctuates or downstream flow changes, suitable for pipeline systems with unstable water supply pressure or requiring zoned pressure stabilization. Its structural design has moderate requirements for medium cleanliness, applicable to general industrial water and non-corrosive fluids.

5. Cost-Effective, Easy Maintenance  

Compared with pilot-operated pressure reducing valves, it has a simpler structure and lower manufacturing cost, offering high cost performance. Main wearing parts such as seals and springs are standardized modules that support quick replacement, resulting in minimal daily maintenance work and low comprehensive operating costs.

Y42X Direct-acting Spring Pressure Reducing valve Structure Diagram

Parts Name Material List

Dimensions Standard Requirements

1. The structural length of the valve shall conform to the standard GB/T12221.

2. The connecting flange shall conform to the standard GB/T 9113.

Y42X Direct-acting Spring Pressure Reducing valve Outline Drawing

Y42X Direct-acting Spring Pressure Reducing valve Dimensions Table