Type A28 Safety Valve
Safety Valves, angle type
Low lift safety valve
Standard safety valve for fluids
Metal to metal seated, with lift device
Connection end acc. to NPT/PT/G thread
Applications:
Provided as safety device for protection against excessive pressure in pressure vessels.
"Approved for gases, vapours and fluids."
Working temperatures: ≤ 300℃
Standards Compliance:
Design and Manufacture: GB/T 12241-2005, GB/T 12243-2005
Face to Face(end to end): JB/T 2203-1999
Test and Inspection: GB/T 12243-2005
Material for main parts
| NO |
Name of part |
A21H-C/A21F,KA21Y-C Material |
A21W-P/A21F-P /KA21Y-P Material |
A21Y-R Materials |
| 1 |
Body |
HT350 |
304 |
316 |
| 2 |
Nozzle |
35 |
304 |
316 |
| 3 |
Adjust ring |
2Cr13 |
304 |
316 |
| 4 |
Disc |
2Cr13 |
304 |
316 |
| 5 |
Spring |
50CrVA |
50CrVA coated teflon |
50CrVA coated teflon |
| 6 |
Stem |
2Cr13 |
2Cr13 |
304 |
| 7 |
Adjusting bolt |
45 |
2Cr13 |
304 |
| 8 |
Cap |
ZG200-400 |
ZG200-400 |
304 |
| Sealing surface of material "H" depositing D507, "W" same as body, "Y" depositing stellite |
Essential:
Valves are delivered at a set pressure, therefore when ordering
Please confirm set pressure, medium and temperature
TS
Safety accessory and Safety protection device
Manufacture License of Special Equipment, People's republic of China
Dimensions(mm)
| DN |
do |
Rc |
L |
L1 |
G |
H |
| 15 |
10 |
1/2" |
37 |
65 |
3/4" |
196 |
| 20 |
12 |
3/4" |
40 |
70 |
1" |
215 |
| 25 |
15 |
1" |
45 |
78 |
1 1/4" |
234 |
| 32 |
20 |
1 1/4" |
55 |
90 |
1 1/2" |
302 |
| 40 |
25 |
1 1/2" |
67 |
105 |
2" |
326 |
| 50 |
32 |
2" |
76 |
115 |
2 1/2" |
348 |
| 65 |
40 |
2 1/2" |
110 |
145 |
3" |
370 |
| 80 |
50 |
3" |
110 |
145 |
4" |
410 |
Remark: NPT, PT, G thread are accepted
