BRIEF DESCRIPTIONS
Stainless Steel Pressure Relief Valve of HFA21Y Series is an overpressure protection relief valve especially used for the line service of air, gas, ammonia etc. Basically, its set pressure range is <10.0 MPa, maximal working temperature <200 DegreeC, thread connection with the pipeline. The material selection can be carbon steel or stainless steel, if stainless steel, the valve is able to handle with corrosive medium for both gas and liquid states.
FEATURES
Stainless Steel Pressure Relief Valve can open and close automatically according to the working pressure of the system, and it is generally installed in the equipment or pipeline of the closed system to protect the system safety. When the pressure in the equipment or pipeline exceeds the set pressure of the pressure relief valve, it will automatically open and release the pressure to ensure that the medium pressure in the equipment and pipeline is under the set pressure to protect the equipment and pipeline and prevent accidents.
 | DESIGN | |
Types: Stainless safety valve Full nozzle with open bonnet, with lever Available sizes: DN10(1/2") up to DN65(2-1/2") Available rating: PN16 up to PN50, Class 150# – 300# Medium: Steam under 350 DegreeC Blowdown: 7%~10% Discharge Coefficient: G-0.75 Connection Flange: ASME B16.5, GOST-12820, JIS Std | ||
Construction | No | Part | Materail-1 | Materail-2 | Materail-3 |
 | 1 | Body | Carbon Steel | SS304 | SS316 |
2 | Seat | Carbon Steel | SS304 | SS316 | |
3 | Adjust Ring | ANSI 420 | SS304 | SS316 | |
4 | Nozzle | ANSI 420 | SS304 | SS316 | |
5 | Spring | Alloy Steel | Alloy Steel | Alloy Steel | |
6 | Stem | ANSI 420 | ANSI 420 | ANSI 420 | |
7 | Adjust Nut | ANSI 420 | ANSI 420 | ANSI 420 | |
8 | Cap | Carbon Steel | SS304 | SS316 |
DIMENSION AND SIZE
Type | Structure Size | Weight | ||||||||
HFA28Y-150Lb | NPS | DN | do | ZG | G | S | L | L1 | H | Kg |
1/2 | 15 | 8 | 1/2" | 3/4" | 30 | 40 | 60 | 130 | 1.6 | |
3/4 | 20 | 12 | 3/4" | 1" | 34 | 45 | 65 | 146 | 2.2 | |
1 | 25 | 15 | 1" | 1-1/4" | 41 | 50 | 80 | 155 | 2.7 | |
1-1/2 | 32 | 20 | 1-1/4" | 1-1/2" | 45 | 55 | 90 | 170 | 3.4 | |
1-3/4 | 40 | 25 | 1-1/2" | 2" | 50 | 60 | 100 | 255 | 5.8 | |
2 | 50 | 32 | 2" | 2-1/2" | 60 | 75 | 110 | 295 | 9 | |
2-1/2 | 65 | 40 | 2-1/2" | 3" | 80 | 90 | 125 | 415 | 23.5 | |
Construction | No | Part | Materail-1 | Materail-2 | Materail-3 |
 | 1 | Pipe Joint | Carbon Steel | SS304 | SS316 |
2 | Joint Nut | Carbon Steel | SS304 | SS316 | |
3 | Seat | ANSI 420 | SS304 | SS316 | |
4 | Body | Carbon Steel | SS304 | SS316 | |
5 | Nozzle | ANSI 420 | SS304 | SS316 | |
6 | Spring Seat | ANSI 420 | ANSI 420 | ANSI 420 | |
7 | Spring | Alloy Steel | Alloy Steel | Alloy Steel | |
8 | Lock Nut | Carbon Steel | SS304 | SS316 | |
9 | Washer | ANSI 420 | ANSI 420 | ANSI 420 | |
10 | Adjust Ring | ANSI 420 | SS304 | SS316 |
DIMENSION AND SIZE
Type | Structure Size | ||||||||||
HFA21Y-150Lb | NPS | DN | d | do | D0 | M | G | D1 | L | h | H |
1/2 | 15 | 13 | 12 | 20 | M27×1.5 | G1/2" | 30 | 35 | 76 | 66 | |
3/4 | 20 | 17 | 16 | 25 | M33×1.5 | G3/4" | 35 | 40 | 87 | 68 | |
1 | 25 | 23 | 18 | 31 | M39×1.5 | G1" | 40 | 50 | 100 | 105 | |
HFA21Y-600Lb | 1/2 | 15 | 10 | 10 | 25 | M39×1.5 | G1" | 44 | 50 | 100 | 66 |
3/4 | 20 | 10 | 10 | 31 | M39×1.5 | G1" | 44 | 50 | 100 | 68 | |
1 | 25 | 12 | 12 | 31 | M39×1.5 | G1" | 44 | 50 | 100 | 105 | |
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