A21 Spring loaded low lift external thread type safety valve
A21 Spring loaded low lift external thread type safety valve
Low lift safety valve introduction:
1.In low lift valves, the disc only lifts a distance of 1/24th of the bore diameter. The discharge area is determined entirely by the position of the disc, and since the disc only lifts a small amount, the capacities tend to be much lower than those of full or high lift valves.
2. low lift safety valve valve opening height is between one twentieth to one fortieth times of the flow diameter.
A21F、A21H-C type are used for the equipment and pipeline of the air, ammonia, petroleum gas, etc. medium what the working temperature are less than 200℃.
A21W-P,R type are used for the equipment and pipeline of the quality with corrode gas and liquid medium what the working temperature are less than 200℃ 。Take for extrapressure protection devices.
KA21Y type are used for liquefied petroleum gas what the working temperature are less than 100℃.
A21H/W/Y Type Spring Loaded Low Lift Safety Valve Main Parts Material
NO. |
Parts Name |
A21H-C/A21F Material |
A21W-P/A21F-P Material |
A21Y-R Material |
1 |
Nipple |
20 |
1Cr18Ni9Ti |
1Cr18Ni12Mo2Ti |
2 |
Nipple Nut |
35 |
2Cr13 |
1Cr18Ni9Ti |
3 |
Seat |
35 |
1Cr18Ni9Ti |
1Cr18Ni12Mo2Ti |
4 |
Body |
2Cr13 |
1Cr18Ni9Ti |
1Cr18Ni12Mo2Ti |
5 |
Disc |
2Cr13/2Cr13+PTFE |
1Cr18Ni9Ti/1Cr18Ni9Ti+PTFE |
1Cr18Ni12Mo2Ti |
6 |
Spring Washer |
2Cr13 |
1Cr18Ni9Ti |
1Cr18Ni12Mo2Ti |
7 |
Spring |
50CrVA |
50CrVA |
50CrVA |
8 |
Locking Nut |
Q235-A |
ZG230-450 |
1Cr18Ni9Ti |
9 |
Guide |
2Cr13 |
1Cr18Ni9Ti |
1Cr18Ni12Mo2Ti |
10 |
Adjusting Bolt |
Q235-A |
2Cr13 |
1Cr18Ni12Mo2Ti |
Sealing |
"Y"---Stellite, "H"------D507, "W"------Body material |
Other Information
1. goole4@goolevalve.com
2. fjxcathy1985@yeah.net
3. fjxcathy@hotmail.com
http://www.china-safetyvalve.com/
http://www.goolevalve.com
Payment:T/T D/P L/C WEST UNION,CASH
Delivery:FOB
Origin:China
Minimum Order:1
Packaging:plywood case