BTL PRESSURE RELIEF VALVE | MODEL: 500X-16

The BTL pressure relief valve, Model 500X-16, is an industrial hydraulic device that protects the safety of piping systems. The valve works through a mechanism that automatically brings the fluid pressure back to the permitted set point. When the pressure in the pipeline exceeds the safe set level, the valve opens automatically and discharges some of the fluid to reduce the pressure. When the pressure returns to equilibrium, the valve closes completely, helping to prevent overpressure that could burst pipes or damage equipment.

Main construction of the BTL 500X-16 pressure relief valve

The BTL 500X-16 pressure relief valve is a pilot-controlled type. It operates entirely on the hydraulic pressure of the fluid in the pipeline itself and requires no electrical power. The main construction of the product includes the following parts:

Technical dimension table of the BTL pressure relief valve (DN50 – DN350)

Operating principle of the BTL 500X-16 pressure relief valve

The BTL pressure relief valve works on the principle of pressure balance between the control chamber above the diaphragm and the main flow pressure in the valve body. This type of device does not rely on a plain mechanical spring alone, as a traditional spring-type safety valve does.

In the normal state, the pressure in the control chamber above the diaphragm is kept equal to or higher than the pipeline pressure and, together with the assisting spring, holds the disc firmly closed on the seat. When the pipeline pressure rises above the set point on the pilot valve, the pilot valve opens and discharges water from the control chamber above the diaphragm to the outside (usually toward the downstream side or out of the system). The pressure in the control chamber drops faster than it can be replenished, upsetting the force balance that holds the disc. The disc is lifted off the seat by the pressure from the main flow, opening a discharge path to relieve the excess pressure in the system.

When the pipeline pressure falls below the set point, the pilot valve closes, water is replenished into the control chamber, and the disc slowly closes back to its original position.

The needle valve controls the speed of water entering and leaving the control chamber, and thereby the opening/closing speed of the main disc. This lets the valve react fast enough when pressure must be released, without opening or closing so abruptly that it causes reverse hydraulic shock in the system.

Operating guide for the BTL 500X-16 pressure relief valve

Before putting the BTL pressure relief valve into operation, set the relief pressure threshold on the pilot valve according to the protection requirements of the system. This can normally be done by adjusting the set screw on the pilot valve while watching the pressure gauge mounted on the main valve body.

Adjust the needle valve to control the reaction speed of the valve: opening too fast can cause unstable pressure oscillation; closing too slowly may fail to relieve pressure in time during a rapid pressure spike.

During operation, monitor the pressure gauge on the valve body to supervise the actual system pressure. If the pressure frequently reaches the relief threshold of the valve, investigate the root cause of the pressure rise in the system, for example a pump running in the wrong mode, rather than relying on the pressure relief valve alone to deal with the problem continuously.

Periodically inspect the signal pipe and the needle valve to make sure they are not blocked. This is one of the common reasons why a BTL pressure relief valve fails to react in time or deviates from its original set point.

Where to buy a genuine BTL 500X-16 pressure relief valve?

To ensure the BTL 500X-16 pressure relief valve operates accurately and gives maximum protection to the piping system, choosing a reputable supplier with in-depth technical knowledge is extremely important. An Phu Thanh is proud to be the exclusive importer and genuine supplier of BTL-brand industrial valves in Vietnam. We meet the demanding requirements of fire protection, water supply and drainage, wastewater treatment, and industrial infrastructure projects.

When you buy a BTL pressure relief valve from An Phu Thanh, you can be fully confident in the quality and technical specifications of the product. All goods come with clear technical documentation, full CO (certificate of origin), CQ (certificate of quality), and a genuine warranty policy. With a large warehouse stocking a wide range of sizes from DN50 to DN350, we are committed to fast supply that meets the construction schedules of projects at home and abroad.

In addition, An Phu Thanh’s experienced team is always ready to accompany you, helping you select exactly the right product for the real requirements of your system. Contact us now via Hotline 0946 729 913 for a special quotation and dedicated consultation support!