Stainless steel safety valve – 770700 SERIES


inlet 3/8", 1/2" or 3/4" - outlet 1/2" or 3/4" - seat orifice Ø10 mm - set pressure up to 64 bar g.

Stainless steel safety valve – 770700 SERIES | Presentation
Stainless steel safety valve – 770700 SERIES | Dimensions
Stainless steel safety valve – 770700 SERIES | Nomenclature
Stainless steel safety valve – 770700 SERIES | Codification

Description

Stainless steel #304L safety valve without lever, with screwed inlet and threaded outlet in its standard version. The tightness is ensured through a very neat lapping of the seat and plug. A wide range of springs enables an accurate pressure setting for this PED 97/23/CE Category IV Group 2 certified saftey valve.

Applications

Designed for use on all air components gases in its standard version, this safety valve offers a wide range of options which allows the handling of a large variety of fluids. this safety valves is extensively is extensively used in every kind of industrial projects: liquid storage tanks, air separation units, petrochemical plants, dangerous products transportation, ...

General features

  • Stainless steel construction
  • Safety valve's behaviour adjustable thanks to a blow-down ring
  • The sturdy design, the high-quality of the selected materials and the high-performance components of this safety valve provide to it multi-purpose characteristics
  • This safety valve does not contain any copper or copper alloy in contact with atmosphere
  • Inlet and outlet as per ISO R228 or ASME/ANSI B2-1

Alternatives

  • PTFE (Teflon™), PCTEF or FPM 20471/70 (Viton™) soft plug insert
  • Flanged inlet and outlet
  • Butt welding fittings at inlet and/or outlet
  • Cap with lever
  • Gas-tight construction
  • ... (see codification)
Dimensions in mm Weight (W) in kg
Inlet L Outlet F H W
0 < Ps < 25 25 < Ps < 64
3/8" G 49 1/2" (G or NPT) 40 133 160 1,7
NPT 54
1/2" G 49 1/2" (G or NPT) 40 133 160 1,7
NPT 56
3/4" G 52 1/2" (G or NPT) 40 133 160 1,8
NPT 56
3/8" G 49 3/4" (G or NPT) 40 133 160 1,7
NPT 54
1/2" G 49 3/4" (G or NPT) 40 133 160 1,7
NPT 56
3/4" G 52 3/4" (G or NPT) 40 133 160 1,8
NPT 56

Ps: Set pressure (bar g.)



For other gases (MW): multiply the air rated flow by sqrt[29/MW]
For other temperatures (T): multiply the air rated flow by sqrt[273/(T+273)] - T in °C


Standard materials
Rep Designation Standard materials


1 Cap EN 10088-3
X8CrNiS18-9 1.4305
AISI 303
1.1 Gasket PTFE
2 Stem EN 10088-3
X8CrNiS18-9 1.4305
AISI 303
3 Adjusting screw EN 10088-3
X8CrNiS18-9 1.4305
AISI 303
4 Spring plate EN 10088-3
X8CrNiS18-9 1.4305
AISI 303
5 Spring EN 10088-1
X10CrNi18-8 1.4310
AISI 302
6 Lantern EN 10272
X2CrNiMo17-12-2 1.4404
A182 F136L
7.5 Blow-down ring EN 10088-3
X8CrNiS18-9 1.4305
AISI 303
8 Plug EN 10088-3
X2CrNi18-9 1.4307
A182 304L
11 Shoulder seat EN 10088-3
X2CrNi18-9 1.4307
A182 F304L
12 Body EN 10222-5
X2CrNi18-9 1.4307
A182 F304L
14 Guide EN 10088-3
X8CrNiS18-9 1.4305
AISI 303


7 7 0 7 0 0 - X X X - 00 00 00 - DN .. PN ..

7 7 0 7 0 0 - X X X - 00 00 00 - DN .. PN ..
Value Plug material
1 PTFE disc
2 PCTFE disc
6 Metal plug (st. st.)


7 7 0 7 0 0 - X X X - 00 00 00 - DN .. PN ..
Value Inlet connection
2 Screwed end
3 Flanges
4 Butt welding fitting


7 7 0 7 0 0 - X X X - 00 00 00 - DN .. PN ..
Value Pressure rating
1 PN16 & class 150
2 PN25
3 PN40/50 & class 300
4 PN64


7 7 0 7 0 0 - X X X - 00 00 00 - DN .. PN ..
Value Option
E ATEX CE Ex II 2G/D


7 7 0 7 0 0 - X X X - 00 00 00 - DN .. PN ..
Value Option
80 Spacer
85 Butt welding fitting at outlet
86 Collected outlet
90 Regular bonnet
92 Gas tight body and bonnet
95 Gas tight cap with lever