Safety valve structure of the classification

Safety valve is installed on equipment, containers or pipes, overpressure protection, when the container or pipe pressure exceeds the allowable value, the valve automatically open the discharge medium; when the pressure drops to the required value, the valve automatically shut down. Safety valve can be divided into different types of direct-acting and pilot-driven. The direct type is driven directly by the system pressure of the valve inlet, at which point it overcomes the media pressure acting under the valve flap by the mechanical load provided by the spring or weight. The Pilot is that it is pilot driven by a structure that uses a mechanism to release or apply a closing force to open or close the safety valve. Depending on the structure of the safety valve can be divided into: spring-type safety valve with a compression spring force to balance valve pressure, so that the safety valve seal. The advantage is the safety valve high sensitivity, light, the installation location is not limited, such safety valve is more commonly used. The disadvantage is that the spring compression force changes with the spring deformation, the higher the temperature, the spring insulation and heat problems exist. Lever hammer safety valve hammer force through the lever after amplification load on the valve. The advantage is that the force applied to the valve flap during valve opening and closing does not change. The disadvantage is more sensitive to vibration, back seat performance is poor. Commonly used in fixed equipment. Pulse safety valve to the main valve and auxiliary valve design together, through the role of auxiliary valve pulse driven main valve role. Commonly used in large diameter, large displacement and high pressure system. All-opening safety valve opens a large height, with the momentum of the gas medium, the valve opens to a sufficient height, the discharge of excess media. Micro-Kai safety valve opening height is not suitable for liquid medium and displacement of small occasions. Fully enclosed safety valve safety valve open the discharge medium seal, drain through the exhaust pipe, commonly used in flammable, explosive, toxic or special media occasions. Semi-closed safety valve safety valve to open the discharge, some of the media excluded from the discharge pipe, some of the media from the valve seat, stem gap into the atmosphere. When the open relief valve is open, the excretion medium is vented to the atmosphere and is suitable for non-polluting media. The pilot-operated safety valve consists of a main valve and a pilot valve. The pilot valve acts to open or close the main valve after receiving system pressure. In addition, the safety valve from the external structure, but also can be divided into a wrench and wrench, a bellows and no bellows, with heat sink and no heat sink and so on. Bellows safety valve for corrosive media or back pressure fluctuations larger occasions; with a wrench safety valve in an emergency situation, the pressure relief by manual operation; a safety valve with heat sink for temperatures greater than 300 ℃ occasions .

Door Accessories

Door accessories include Automatic Door Kits , High Speed Door Motor And Control Box, High Speed Door Accessories, Other Door Accessories. We can sell any parts of these accessories.

Automatic door kits: Our automatic door kits include 1 motor+gear reducer, 1 belt,7 meter, 1 idle pulley, Microprocessor, 4 sets of carriage blue wheels, 2 sets of floor guides,2pcs remote control, 2 sets belt clamp mounting brackets, 1 power supply harness and cable connectors, 2 locator, Aluminum track whose length is 2.08 meter, 3 meter, or 4 meter. We are a manufacturer of automatic door openers that are designed to provide people convenience. Automatic Door Systems` drive to provide that level of service is but one of the reasons why automatic doors are becoming more and more popular. Our Automatic Sliding Door systems are modern, space-saving and elegant. Automatic sliding doors have many basic functions some of which include: automatic mode with full opening width and/or reduced opening width, and exit only for traffic control. The opening of automatic doors can also be adjustable to make the opening width smaller or larger. Important safety functions such as safety sensors prevent the door from shutting if persons or objects are in the detection zone. If the door leaves are inhibited when closing, they are immediately re-opened or if the door leaves are hindered when opening, they are immediately stopped by a safety automatic reversing mechanism.

High Speed Door motor and control box: Our company have German SEW Motor, Japan Mitsubishi Controller. Our own brand Hofic servo motor and controller. Chinese famous brand SEJ motor and Holip controller. German SEW Motor and Japan Mitsubishi Controller: It is easy to find the ideal energy-efficient motor for your application at SEW. Our rolling gate servo control system is suitable for high speed and high usage soft and hard rolling gate. The whole system is in a small and light package, it has high torque and high operating speed, lower noise, high reliability, smooth and soft operating curves, it`s suitable for high speed and usage environment. SEJ motor and Holip controller: Three-phase asynchronous motor with magnetic brake has broad uses, It is suitable for various mechanical main drive and auxiliary drive, and it is also used for various required rapid stopping and correct positioning.

high speed door accessories: Driving system: High speed door Servo System motor and control, motor SNMA / SEJ +reducer+flang+encoder+control box. Other accessories: Middle aluminium bar, bottom aluminium bar, aluminium vertical track, stainless steel vertical track, brushes,round nylon strip, PVC roll, rolling steel tube complete, drum be;;s for rolling tube, side end covers, stainless steel cover, steel tubes, air bag sensor system, safety light beam, Microwave sensor 24 Gigahertz,PVC welding machine, smoke and fire sensors, PVC transparent window, magnetic loop, photocell, remote control, manual push button, sound warning alarm Led lamp traffic light.

Other door accessories: Sectional door accessories: motor 220V-380V, control box, spring break device, cable break device , aluminum alloy rope pulley, enhanced shaft bracket, air bag system, duplex enhanced guide wheel bracket.

For accessories detail information, please kindly check our detail classify.

Door Accessories,Automatic Door Kits,High Speed Door Accessories,Sliding Door Operator

Shenzhen Hongfa Automatic Door Co., Ltd. , https://www.hfgaragedoor.com