High quality low temperature safety valve

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Stability - high-quality cryogenic safety valves are very important in our daily life and industrial production, and Xinliantong provides you with high-quality services.

What is a High quality low temperature safety valve

The safety valve is a special valve that is in a normally closed state under the action of external force. When the pressure of the medium in the equipment or pipeline rises beyond the specified value, it discharges the medium to the outside of the system to prevent the medium pressure in the pipeline or equipment from exceeding the specified value. 

Vacuum tube cryogenic safety valves are automatic valves, mainly used in boilers, pressure vessels and pipelines. The control pressure does not exceed the specified value, which plays an important role in protecting personal safety and equipment operation. NOTE The Vacuum tube cryogenic safety valve must be pressure tested before it can be used.

 Stable cryogenic safety valve

process status

The Vacuum tube cryogenic safety valve is a special branch of the valve family. It is special because it is different from other valves that only play the role of a switch, and more importantly, it plays the role of protecting the safety of the equipment. With the rapid development of my country's economic construction, there are more and more equipment projects with pressure control. In view of the need for equipment pressure relief, Stable cryogenic safety valves play a vital role in the process of protecting equipment.

As of 2013, there were more than 700 manufacturers and traders of various types of Stable cryogenic safety valves, and more than 200 inquiries were traded every day. According to the preliminary analysis of the data in the first quarter, the demand for Stable cryogenic safety valves is 20% higher. 

Safety valves are important safety accessories on boilers, pressure vessels and other pressure equipment. The safety valve (also known as the pressure relief valve) is automatically opened and closed according to the working pressure (working temperature) of the pressure system, and is generally installed on the equipment or pipeline of the closed system to protect the safety of the system.

When the pressure or temperature in the equipment or pipeline exceeds the set pressure of the safety valve, the pressure relief or cooling will be automatically opened to ensure that the pressure (temperature) of the medium in the equipment and pipeline is below the set pressure (temperature), and the normal operation of the equipment and pipeline will be protected. Prevent accidents and reduce losses.

High quality low temperature safety valves are mainly used in: steam boilers, liquefied petroleum gas truck tankers or liquefied petroleum gas railway tankers, oil production wells, high pressure bypass of steam power generation equipment, pressure pipelines, pressure vessels, etc. 

High quality low temperature safety valves are generally divided into spring-type High quality low temperature safety valves, lever-type safety valves, and pulse-type safety valves according to their structural forms. Among them, spring-type safety valves are the most widely used; they are divided into threaded safety valves and flange safety valves according to their connection methods. 

The caliber of safety valves is generally not large, and the commonly used ones are between DN15mm-DN80mm, and those exceeding 150mm are generally called large-diameter safety valves. It is an indisputable fact that the market scale of the safety valve industry expanded in 2013.

There are not many companies in my country that are qualified to produce safety valves, because safety valves belong to the special equipment industry. The State Administration of Quality Supervision is relatively strict in applying for qualification review, and the huge demand for safety valves in the market will undoubtedly give these qualified production safety. Valve businesses bring more opportunities for wealth.

Technical term with Stable cryogenic safety valve

The safety valve plays a safety protection role in the system. When the system pressure exceeds the specified value, the safety valve is opened, and part of the gas/fluid in the system is discharged into the atmosphere/pipeline, so that the system pressure does not exceed the allowable value, thus ensuring that the system does not cause an accident due to excessive pressure.

Nominal pressure:

Indicates the maximum allowable pressure of the safety valve at room temperature. The safety valve used for high temperature equipment should not consider the reduction of the allowable stress of the material at high temperature. The safety valve is designed and manufactured according to the nominal pressure standard.

Opening pressure:

Also called rated pressure or set pressure, refers to the inlet pressure when the safety valve disc begins to rise under operating conditions. Under this pressure, there is a measurable opening height, and the medium is visually or auditory. Continuous discharge state.

Discharge pressure:

The inlet pressure when the disc reaches the specified opening height. The upper limit of discharge pressure is subject to the requirements of relevant national standards or specifications.


The difference between discharge pressure and cracking pressure, usually expressed as a percentage of cracking pressure.

Seat pressure:

The valve disc is in contact with the valve seat again after discharge, that is, the inlet pressure when the opening height becomes zero.

Opening and closing pressure difference:

The difference between the opening pressure and the reseating pressure, usually expressed as the percentage of the reseating pressure and the opening pressure, only when the opening pressure is very low, the difference between the two pressures is used to express.

Vacuum tube cryogenic safety valve

Back pressure:

The pressure at the outlet of the safety valve.

Rated discharge pressure:

The standard specifies the upper limit of the discharge pressure.

Seal Test Pressure: 

The inlet pressure at which the seal test is performed, at which the leakage rate through the sealing face of the closure is measured.

About XingLianTong

Chengdu XinLianTong cryogenic equipment Co.,Ltd founded in 2006,We are the scientific and technological enterprise mainly engaged in the manufacture and development of High vacuum multilayer insulation liquid pipelines (low temperature thermal insulation pipe), high vacuum insulated cryogenic liquid hose (cryogenic liquid insulation hose), vacuum insulation cut-off valve, vacuum insulation check valve, vacuum insulation emergency cut-off valve, low temperature storage tank and air separation equipment, dedicated vacuum insulation joint, atmospheric pressure and LNG cryogenic liquid container vacuum device prizing, LNG piping system for vacuum pump pool,Come to our website to learn more.