Type A28H Full Lift Plain Lever Safety Valve
full lift safety valveStandard safety valve for fluidsmetal to metal seatedwith plain lift devicethreaded end
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Type A28 Safety Valve
safety valve/pressure relief valve, angle type
full lift safety valve
Standard safety valve for fluids
metal to metal seated
with plain lift device
threaded end
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 |
A28H-C/A28F,KA28Y-C Material |
A28W-P/A28F-P /KA28Y-P Material |
A28Y-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, R, G thread are accepted
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