Specifications
The Specifications section on this page provides specifications for the Enardo 860 and 960 Series spring-loaded
pressure/vacuum relief valve. Specification is stamped on the nameplate attached to the relief valve. Refer to
Product Identification and Marking section for the nameplate details.
Available Construction
See Figure 3
Inlet Connection Sizes
2 through 6 in. / 50 through 150 mm
Pressure Ranges
(1)(2)
0.5 to 15.0 psi
0.5 to 32.0 oz./sq. in.
1.0 to 55.0 in. w.c.
2.0 to 138 mbar
Vacuum Pressure Ranges
(1)(2)
0.5 to 15.0 psi
0.5 to 32.0 oz./sq. in.
1.0 to 55.0 in. w.c.
2.0 to 138 mbar
Construction Materials
Housing:
Aluminum, Stainless steel or Carbon steel
Seat / Pallet:
Polyphenylene Sulfide (PPS) or 316
Stainless steel (standard above 5 psi)
Pallet Seal:
Buna-N, FEP Teflon
®
or Viton
®
Hardware:
Zinc plated carbon steel or Stainless steel
Weights:
Zinc plated carbon steel, Stainless steel
or Lead
Gaskets:
Buna-N, Teflon
®
or Viton
®
Certification
EN IEC 60079-0:2018
EN IEC 60079-11:2012
EN ISO 80079-36:2016
EN ISO 80079-37:2016
1. The pressure limits in this Instruction Manual and any applicable standard or code limitation should not be exceeded.
2. Pressure or vacuum setting has an increment of 0.5 psi, 0.5 oz./sq. in., 0.5 in. w.c. or 2.2 mbar.
Teflon
®
and Viton
®
are marks owned by E. I. du Pont de Nemours and Co.
Figure 3.
Pressure/Vacuum Relief Valve Model Number
ENARDO MODEL 860 SPRING-LOADED PRESSURE/VACUUM RELIEF VALVE MODEL NUMBER
ENARDO MODEL 960 SPRING-LOADED PRESSURE/VACUUM RELIEF VALVE MODEL NUMBER
Inlet
Connection
Size
(2 through
6 in.)
Inlet
Connection
Size
(2 through
6 in.)
Outlet
Connection
Size
(3 through
8 in.)
Housing Material
1 = Aluminum
4 = 316 Stainless
Steel
5 = Carbon Steel
Housing Material
1 = Aluminum
4 = 316 Stainless
Steel
5 = Carbon Steel
Pallet and Seat
Material
1 = PPS Polyphenylene
Sulfide (max 5 psi)
2 = 316 Stainless steel
(max 14.99 psi)
Pallet and Seat
Material
1 = PPS Polyphenylene
Sulfide (max 5 psi)
2 = 316 Stainless steel
(max 14.99 psig)
Pallet Seal
Material
1 = FEP
2 = Nitrile (NBR)
3 = Fluorocarbon
(FKM)
Pallet Seal
Material
1 = FEP
2 = Nitrile (NBR)
3 = Fluorocarbon
(FKM)
Body/Seat/Lid Seal
Material
1 = PTFE Body and
FEP Seat/Lid
2 = Nitrile (NBR)
3 = Fluorocarbon
(FKM)
Body/Seat/Lid Seal
Material
1 = PTFE Body and
FEP Seat/Lid
2 = Nitrile (NBR)
3 = Fluorocarbon (FKM)
Pressure Units
z = oz./sq.in.
n = in. w.c.
mm = mm w.c.
mb = mbar
p = psi
Pressure Units
z = oz./sq.in.
n = in. w.c.
mm = mm w.c.
mb = mbar
p = psi
Vacuum Units
z = oz./sq.in.
n = in. w.c.
mm = mm w.c.
mb = mbar
p = psi
Vacuum Units
z = oz./sq.in.
n = in. w.c.
mm = mm w.c.
mb = mbar
p = psi
Pressure Setting
Maximum = 14.99 psig /
1034 mbarg
Pressure Setting
Maximum = 14.99 psig /
1034 mbarg
Vacuum Setting
Maximum = 14.99 psig /
1034 mbarg
Vacuum Setting
Maximum = 14.99 psig /
1034 mbarg
Weight Material
C = Carbon Steel
Zinc-Plated
S = 316 Stainless steel
L = Lead
Weight Material
C = Carbon Steel
Zinc-Plated
S = 316 Stainless steel
L = Lead
Options
0 = No Options
F = Flat Face Flange (standard for Aluminum)
R = Raised Face Flange (standard for CS, DI, SS)
X = Epoxy
Options
0 = No Options
F = Flat Face Flange (standard for Aluminum
R = Raised Face Flange (standard for CS, DI, SS)
X = Epoxy
ENARDO 860 -
ENARDO 960 -
X
-
-
/
-
-
/
-
-
/
-
2
Enardo 860 and 960 Series
Outside North
America Only
