Safety Valve - Types

Types

There is a wide range of safety valves having many different applications and performance criteria in different areas. In addition, national standards are set for many kinds of safety valves.

• ASME I tap - a safety valve in accordance with the requirements of Section I of the application code ASME pressure vessel, which opens 3% and 4% of the pressure. Will rule on two rings serving and supported by a National Seal V defined.
• ASME VIII valve - safety valve in accordance with the requirements of Article VIII of the ASME code for pressure vessel applications, which is within 10% overpressure that opens and closes in 7%. Characterized by a National Board UV stamp.
• Low-lift safety valve - the current position of the disc around the drain valve.
• Full lift safety valve - the region of the exemption is not determined by the position of the disc.
• Full-flow relief valve - A valve which is expected in the hole and lift the valve a sufficient measure of the minimum area for each position or under the seat to make the control panel.
• Safety Valve classic - The spring housing is vented to the pressure side, i.e., functional characteristics are directly influenced by changes in pressure in the valve.
• Valve balanced - a balanced valve includes a means to minimize the effects of pressure on the operating characteristics of the valve.
• Guide pressure valve - The largest dump device is in conjunction with controlled, self-actuated auxiliary pressure relief.
• Power operated valve - A pressure relief valve in which the main system to relieve pressure combined with and controlled by a device requires an external power source.
• Is the standard safety valve - a valve opening to achieve the degree of buoyancy required for mass flow increases the pressure to reject over 10%. (The valve is characterized by a score of popular art, sometimes also called high-lift).
• Full-lift (solid line) valve - a valve that opens at the beginning of the elevator, quickly, with a 5% increase in pressure until complete removal is limited by design. The amount of lift to an early start (analog) can not exceed 20%.
• Valve and spring - a safety valve for the treatment of violent opening of the valve plate by a clamping force as a spring or weight.
• Proportional-relief valve - a safety valve which opens more or less stable in comparison with increasing pressure. sudden opening within a stroke by 10% will not happen without increasing pressure. After opening at a pressure greater than 10% meet these safety valves of the lift and landed on the mass flowmeter.
• Safety valve diaphragm - A direct-loaded safety valve with linear and rotary components and springs to protect against the effects of the liquid membrane.
• Bellows valve - A direct-loaded safety valve and slide (or part) of rotating elements and sources are protected from the effects of fluid through bellows. The bellows allows such an interpretation, it is as if the influences of pressure.
• Controlled valve - A valve that consists of a main valve and a control unit. It also includes direct acting safety valves with additional load, which, until the total pressure reached, an additional force increases the closing force.
• Safety valve - A valve that automatically, without using any form of energy than the liquid in the discharge quantity of liquid, so as to prevent a predetermined safe pressure is higher, and closed again to prevent the flow of more volatile after the normal working pressure were restored. Note that the valve can be characterized by a pop-action (quick opening) or open relationship (not necessarily linear) on increasing pressure over the whole pressure.
• Valve and spring - a safety valve when the charger through the liquid under pressure valve plate with mechanical pressure directly, unlike, for example, a weight, lever and weight or spring.
• Assisted valve - A valve which can be lifted by a support mechanism for moving, also gradually the pressure that the pressure setting, and for failure to comply with a mechanism to support all requirements for safety valves in the standard.
• Safety valve spring in addition - as a safety valve until the inlet pressure safety valve to the pressure achieved additional power increases the power of foreclosure. Note that this extra power (extra weight), which is made from an external power source is available, reliable published when the inlet pressure reaches the safety valve pressure set. The amount of the extra load is placed so that if such a charge is released, the safety valve of certified capacity at a pressure not greater than 1. protected 1 times the maximum allowable pressure devices.
• Master valve - A valve whose operation is initiated and controlled by the fluid discharged from a pilot valve is a safety net direct costs, provided that standard.