Structure and Parameter:
Valve Design: ASME, API 526, GB/T 12243-2005
Material: A216-WCB, A216-WCC, A217-WC6, CF3, CF3M, CF8, CF8M.
Pressure Grade: 150Lb, 300Lb, 600Lb, 900Lb, PN16~PN320
Seal Test Pressure: 0.9PS
Discharge Pressure: ≤1.1PS
Back Seat Pressure: ≥0.85PS
Lift Height: ≥(1/4)do
Coefficient of Discharge: G-0.75
Connection Flange: ASME B16.5, GB/T 9113.1/2-2000.
NO. |
Name of part |
HFA42Y-C Material |
HFA42Y-P Material |
HFA42Y-R Material |
|
Nozzle |
2Cr13/SS304 |
A351-CF8 |
A351-CF8M |
2 |
Body |
A216-WCB |
A351-CF8 |
A351-CF8M |
3 |
Adjusting ring |
2Cr13/SS304 |
SS304 |
SS316 |
4 |
Disc holder |
2Cr13/SS304 |
SS304 |
SS316 |
5 |
Disc |
2Cr13/SS304 |
SS304 |
SS316 |
6 |
Guide sleeve |
2Cr13/SS304 |
SS304 |
SS316 |
7 |
Bonnet |
WCB |
SS304-450 |
SS316 |
8 |
Spring |
50CrVA |
50CrVACoated Teflon |
50CrVA/ Inconel |
9 |
Stem |
2Cr13/SS304 |
SS304 |
SS316 |
10 |
Adjusting bolt |
45 |
SS304 |
SS316 |
11 |
Cap |
ZG200-400 |
SS304 |
SS316 |
Codes and Standards:
United States
ASME (American Society of Mechanical Engineers) Boiler & Pressure Vessel Code, Section I
ASME (American Society of Mechanical Engineers) Boiler & Pressure Vessel Code, Section VIII, Division 1
API (American Petroleum Institute) Recommended Practice 520 and API Standard 526, API Standard 2000 (low pressure - Storage tank
European Union
European standard steam boiler safety valveISO 4126 (harmonized with European Union directives)
EN 764-7 (former CEN standard, harmonized with European Union directives, replaced with EN ISO 4126-1)
AD Merkblatt (German)
PED 97/23/EC (Pressure Equipment Directive - European Union)
China
JB/T308-2004 <Valves Code>
GB/T12241-2005 <Safety Valves’ Design, Manufacture and Test>
GB/T12243-2005 <Safety Valves’ Design, Manufacture and Test>