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Catalog #: VRV-0
June. 2012
Materials of construction
Ordering Number and Table of Dimensions
Technical Data
* Lubricants listed in blue.
Components
Valve Body Materials
SS316 Stainless
Brass
Body
ASTM A276 / A479 TYPE 316
ASTM B16 / Brass 360
(Nickel plated)
Stem
ASTM A276 / A479 TYPE 316
ASTM B16 / Brass 360
Quad-Ring
FKM
NBR
Spring
STAINLESS STEEL 302
STAINLESS STEEL 302
Spring retainer
ASTM A276 / A479 TYPE 316
ASTM B16 / Brass 360
Lock nut
STAINLESS STEEL
STAINLESS STEEL
Basic Ordering No.
Pipe Size NPT Orifice mm(inch)
Dimension mm(inch)
A
HEX.
V61-M-2N
1/8”Male NPT
4.74 (0.187)
24.6 (0.97)
12.7(1/2)
V61-M--4N
1/4”Male NPT
6.98 (0.275)
30.48 (1.2)
15.87 (5/8)
V61-M-6N
3/8”Male NPT
8.76 (0.345)
31.5 (1.24)
19.05 (3/4)
V61-M-8N
1/2”Male NPT
10.41 (0.41)
44.5 (1.75)
25.4 (1.0)
V61-M-12N 3/4”Male NPT
14.47 (0.57)
57.15 (2.25)
28.57 (1-1/8)
V61-M-16N
”Male NPT
19.94 (0.785)
79.25 (3.12)
38.1 (1-1/2)
1. Set Pressure Range : 0.5 to 150 psig (0.03 to 10.4 bar)
2. Temperature Range : -45° to 400°F (-195°C to 204°C)
Material
Designator
Temperature Rating
FKM
VT
-18 to 400°F (-28°C to 204°C)
NBR
BN
-4 to 221°F (-20°C to 105°C)
EPDM
EP
-49 to 275°F (-45°C to 135°C)
FFKM
KZ
-22 to 599°F (-20°C to 315°C)
V61 Series Vent Relief valves
Pressure up to 150 psig (10.4 bar)
Features
●
Precise cracking pressure with high reliability.
●
Keeping the sealing to 95~98% of Set Pressure at least.
●
Reliable Reseal performance.
●
Tamper proof design.
Design and applocation
V61 Series Vent relief valves is designed to vent out the excess pressure from the line automatically to
keep the required line pressure safely when the line pressure is exceeded over the limitation unusu-
ally. This valves can be used in the case that the working fluid is not harmful when vented out. The
level of cracking pressure should be set by adjusting the force of the spring in the valve before this
valve is installed in the system.
Installation and Operation
This valve should be positioned perpendicularly to the direction of fluid flow in the line and that
position should be considered and the vented fluid should be not directed to the personnel operating
and the parts that has any influences on that. The line system should be run to check the performance
of the valve after the personnel operating move to the safty zone. Because this valve is opened auto-
matically when the excess of the required Line pressure.
Body
Spring
Spring Retainer
Lock nut
Stem
Quad Ring