A42Y spring fully opened closed safety valve

A42Y spring fully opened closed safety valve: A42Y spring fully opened closed safety valve is suitable for equipment and pipelines with working temperature ≤300ºC air, petroleum gas, liquid and other media. Stainless steel spring fully open closed safety valve is suitable for corrosive media equipment and pipelines with working temperature ≤200ºC, as an overpressure protection device. Spring full open safety valve connection flange standard according to JB/T...... -94 series 1. ≥6.4MPa by JB/T... -94 Series 2.

Working principle of spring type full lift safety valve

Safety valve is to prevent the pressure equipment and container or easy to cause the pressure rise or the internal pressure of the container to exceed the limit and burst safety device. The safety valve is a widely used safety device for pressure vessels, boilers, pressure pipelines and other pressure systems to ensure the safe operation of the pressure system. When the pressure of the container exceeds the design provisions, the safety valve automatically opens, and the excessive pressure in the gas reducer is discharged to prevent the damage of the container or pipeline. When the pressure in the container drops to the normal operating pressure, it automatically closes to avoid all the gas discharged due to the overpressure of the container, resulting in waste and production interruption. The safety valve is mainly composed of three parts: the seat, the disc (spool) and the loading mechanism. Some of the valve seat and the valve body is a whole, some and the valve body assembled together, it is connected with the equipment. The valve disc is often associated with a stem, which is tightly fastened on the seat. Above the disc is the loading mechanism, the size of the load can be adjusted. When the pressure in the equipment is within a certain range of working pressure, the force of the internal medium acting on the valve disc is less than the force of the loading mechanism added to the valve, the difference between the two constitutes the sealing force between the valve disc and the seat, so that the valve disc presses the valve seat, the media of the equipment can not be discharged. When the pressure in the equipment exceeds the specified working pressure and reaches the opening pressure of the safety valve, the internal medium acts on the force above the flap is greater than the force imposed on it by the loading mechanism, so the valve flap leaves the seat, the safety valve is opened, the media in the equipment is discharged through the valve seat, if the displacement of the safety valve is greater than the safety discharge of the equipment, the pressure in the equipment gradually decreases, And after a short period of exhaust, the pressure is reduced to the normal working pressure. At this time, the internal pressure acting on the force above the valve disc is less than the loading mechanism imposed on it, the valve disc is pressed tightly against the seat, the medium stops discharging, and the equipment continues to operate at normal working pressure. Therefore, the safety valve is through the pressure of the medium on the valve disc and the pressure of the loading mechanism, closed or opened by itself to prevent the purpose of equipment overpressure.

Spring full open safety valve main parts materials

Dimensions and connection dimensions of spring-loaded full-lift safety valve

 Safety valve main points of order
Safety valve medium, pressure level, opening mode (full opening/micro opening) set the take-off pressure, determine the valve size, connection mode, standard maximum temperature resistance, release flow/hour, valve body material, internal valve body structure, working principle, installationinstructions and other related technical data. Safety valve selection is mainly based on (take-off pressure and neat pressure flow temperature) caliber general design institute will be given, and in fact through the steam pressure, flow and take-off pressure, you can infer the size of the safety valve. Generally, it will be smaller than the caliber selected by the design institute. When the occasion is very important or the environment is more complex, please try your best to provide design drawings and detailed parameters, by our Xuan Cheng valve company experts for your review.

Xuan Cheng valve after-sales service commitment

For your company in Xuan Cheng valve order valve products, our factory in the after-sales service to make the following commitments:
First, our company implements three guarantees for product quality, namely: warranty, replacement, warranty;
2. After signing the contract, ensure quality, quantity and delivery on time;
Third, the company to ensure that the valve products provided to meet the contract indicators
For the technical consultation of the demander, we will provide answers at any time;
5. When delivering the equipment, the factory shall deliver the following materials to the demander: shipping list, product certificate, product sample, product instruction manual and technical data;
When receiving the letter or phone call of the user's response to the quality problem, we guarantee to reply within 24 hours to solve the problem as soon as possible.