Product Overview

It is used to control the liquid level of water towers or pools, featuring simple maintenance, flexibility and durability, high level control accuracy.

The water level is not affected by water pressure, and it opens and closes tightly without water leakage.

Main Features

• Dual Function: Combines pressure sustaining and relief in one valve.
• Precise Control: Stabilizes system pressure within preset safe range.
• Reliable Performance: Robust structure, low leakage, minimal maintenance.
• Versatile Use: Suitable for water, oil, etc., in water supply, heating systems.
• Easy Handling: Compact for installation; pressure adjustment is simple.

Working Principle

The pressure sustaining and relief valve operates by balancing the system pressure against the force of its internal spring: it stays closed to when pressure is low, and opens to release excess pressure when pressure exceeds the preset limit, then closes again once pressure returns to normal.

Structural Features

• Integrated Core Structure: Combines pressure-sustaining and relief components in one compact body.
• Spring-Actuated Disc: Equipped with a built-in spring and valve disc for pressure-sensitive operation.
• Tight Sealing Design: Uses high-quality seals between disc and seat to minimize leakage.
• Simple Pressure Adjustment Part: Has an accessible component (e.g., adjustment nut) for setting pressure easily.
• Sturdy Body Material: Made of durable materials (e.g., cast iron, stainless steel) to withstand system pressure.

Maintenance

• Check hydraulic oil level annually
• Test closing time every 6 months
• Inspect disc and seat for wear during system shutdowns
• Lubricate adjustment mechanism yearly
• Verify proper operation after system pressure changes