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Type A46C - Pilot Operated Safety Valve

Pilot operated safety valve, newly structured--is mainly applied to such trades as petroleum &

natural gas, chemistry, electric, metallurg & burning gas. It is the best super-pressure protecting

equipment on presss equipment, container or pipeline. It is mainly characteized by shifting direct

function of spring to indirect function of quide valve. What's more, main valve, applying for sleeve

piston & double sealed seat, is characterized by high precision of action, good recycling function, 

fast turning back to seat, ability to high pressure leaking, long working time and security, toge-

ther with read-justment on line, automatic turning back to saet after leaking again and again,

tight closure, operating and maintaining convenience.

Standards Compliance:

Design and Manufacture: API RP 520

Face to Face(end to end): API 526

Test and Inspection: API 527


Main property specifiecation

Mormal PressurePN150300600900150
Body strengthPs(Mpa)3.07.51522.537.5
Set pressurePk(Mpa)0.1-21.6-53.2-108-2510-25
Seal pressurePm(Mpa)90%Pk
Reseation pressurePh(Mpa)≥90%Pk
Relieving PressurePp(Mpa)≤1.1Pk
Lift heightH(mm)≥1/4 d0
Appropriate       temp.≤250℃
Appropriate       MediumAir, oil, water, corrosive medium


Code of throat diameter

CodeDiameterCodeDiameter
D10L20
E13M55
F16N60
G20.5P72
H26Q96
J33R115
K40T148


Main Dimensions

SizeOrificeInlet LBOutlet LBLL1CSizeOrificeInlet LBOutlet LBLL1C
1" X 2"D.E.F1501501151051062" x 3"G.H.J150150130130457
300150115105106300150130130457
600150115105106600150130130457
900300121125508900300167167559
15003001211255081500300167167559
25003001211255082500300178178559
11/2" x2"D.E.F1501501211244323" x4"J.K.L150150156156483
300150121124432300150156156483
600150121124432600150162162483
900300140149533900300190190610
15003001401495331500300190190610
2500300140149533
11/2" x3"G.H1501501241304574" x 6"L.M.N.P150150229181559
300150124130457300150229181559
600150124130457600150229181559
900300171162559900300233249711
15003001711625591500300233249711
25003001711625592500600264249711














6" x8"Q.R1501502402406358" x10"T150150279276711
300150240240635300150279276711
600150240240635600150279297737


Materials for main parts

NO.Name of partAx46Y/F AF46Y/F MaterialKAx46Y/F Material
1BodyWCBWCB
2Disc2Cr13/PTFE304/PTFE
3Guide304304
4Spring50CrVA50CrVA
5Otype ringVitonViton
6Bonnet2525
7Pilot valveParts


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



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A46C

Pilot operated type, for highback prssure fluid