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Special equipment -A27W-10T with handle spring, micro opening safety valve, gas storage tank safety valve DN80

price:USD$650.00
discount 70% in 2018-09-23 to 2018-09-25
price: USD$ 455.00
freight :USD$18.00,(Express)
freight :USD$7.00,(Postal parcel)
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Brief description: A27W-10T spring external thread safety valve
A27W-10T series safety valve, is suitable for the work temperature are less than 200 of the air, water, steam and other media equipment or pipeline, as the overpressure protection device. When the pressure in the equipment or pipeline exceeds the allowable value, the valve opens automatically, and then the total amount is discharged. When the pressure is low to the specified value, the valve is automatically closed to ensure the safe operation of the equipment.

Detailed introduction:

A27W-10T series safety valve, is suitable for the work temperature are less than 200 of the air, water, steam and other media equipment or pipeline, as the overpressure protection device. When the pressure in the equipment or pipeline exceeds the allowable value, the valve opens automatically, and then the total amount is discharged. When the pressure is low to the specified value, the valve is automatically closed to ensure the safe operation of the equipment.
Material of main parts
NO. part name A27W-10T material
1 body and bonnet HT200
2 valve seat, valve copper
3 stem 2Cr13
4 spring 50CrVA
Outline dimensions and connection dimensions
Nominal size
do Rc L L1 G H
15 10 1/2" 40 65 1/2" 135
20 15 3/4" 45 70 3/4" 140
25 20 1" 45 76 1" 155
32 25 11/4" 55 85 11/4" 170
40 32 11/2" 55 85 11/2" 310
50 40 2" 67 100 2" 322
65 50 21/2" 76 112 21/2" 344
80 65 3" 110 135 3" 395
Common faults and elimination methods of safety valve
(1) the valve does not return to the seat after discharge. This is mainly caused by the spring bending stem and the valve seat not installed properly or jammed. It should be reassembled.
(2) leakage. Under the normal working pressure of the equipment, the leakage between the valve seat and the sealing surface of the valve seat exceeds the allowable degree. The reason is: there is dirt between the valve seat and the sealing surface of the valve seat. You can use the lifting wrench to open the valve a few times, the dirt rushed; sealing surface damage. According to the degree of damage, grinding or turning grinding method to repair; stem bending, tilt or lever and fulcrum deviation, so that the spool and valve dislocation. Should be reassembled or replaced; spring elasticity reduces or loses elasticity. Measures should be taken to replace the spring and readjust the opening pressure.
(3) do not open to the specified pressure. The reason for this is that the pressure is not allowed. The amount of compression or the position of the hammer should be readjusted, and the valve seat and the valve seat must adhere to each other. The safety valve shall be manually discharged or discharged at regular intervals; the lever of the lever type safety valve is jammed or the heavy hammer is moved. The position of the hammer should be re adjusted and the lever can move freely.
(4) the pressure continues to rise after the exhaust. This is mainly because the safety valve displacement with Xiaoping equipment safety discharge, should be re select the appropriate safety valve; the valve stem rust midline or spring, so that the valve can not open to a certain height, the stem should be re assembled or replace the spring; exhaust pipe section has not, should be taken to meet the safety area of the exhaust emissions tube.
(5) frequency jump or vibration of valve disc. The main reason is that the spring stiffness is too large. The spring with proper stiffness should be used, and the pressure of the seat back should be too high due to improper adjustment of the adjusting ring. The position of regulating ring should be re adjusted; the excessive resistance of the discharge pipe will result in excessive discharge back pressure. Discharge piping resistance should be reduced.
(6) less than the required pressure to open. The main reason is the constant pressure is not allowed; the spring aging elasticity drops. Screw or replace spring should be tightened properly.