Maintenance of pressure relief valves

Introduction

Safety release valves and valves used in critical operating conditions are essential for maintaining safe and effective systems and environmental protection. These valves are often used to control the pressure of the system and to avoid pressure buildup resulting in serious safety problems and hazards. This is why these valves require regular maintenance and maintenance.

Working principle of pressure relief valve

The hydraulically controlled pressure relief valve senses the upstream pressure of the valve. When the pressure exceeds the set safety value, the valve automatically opens to discharge part of the water to reduce the pressure. When the pressure returns to the safe range, the valve closes.

Frequently Asked Questions and Countermeasures in Maintenance:

Leakage

Cause: The sealing ring is damaged; the screw is loose.

Exclusion method: Replace the seal ring; tighten the screws.

System pressure fluctuations

Cause: The hydraulic oil is not clean, the screws are loose, and the valve core is not moving smoothly.

Exclusion method: Clean the fuel tank regularly and tighten the screws.

Sudden increase in pressure or sudden decrease in pressure

Reason: The valve core is not sensitive to movement and the valve core damping hole is blocked.

Exclusion method: Clean the valve body and damping hole.

How long is the maintenance cycle of the pressure relief valve generally?

I. Industrial production

High-load continuous operation system: In continuous production devices in chemical, petroleum, electricity and other industries, pressure relief valves are usually fully maintained every 3 to 6 months.

Second, the field of commercial facilities

Pressure relief valves in air conditioning systems and fire protection systems in large commercial buildings: such as shopping centers, office buildings, hotels, etc., are generally recommended to be maintained once a year.

Third, civil residential areas

Centralized heating system: For the pressure relief valve in the centralized heating system, maintenance is generally carried out once every 2 to 3 years.

Forth, Household water supply and drainage system

The pressure relief valve on the water heater wall hanging furnace and other equipment in the family is usually maintained every 3 to 5 years.

Summarize

In short, regular maintenance and maintenance of pressure relief valves is an important measure to ensure the safe operation of the system, improve the service life of the equipment, and ensure the safety of personnel. It is recommended to conduct a comprehensive pressure relief valve inspection and maintenance at least once a year to ensure its proper operation.