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VP33 Series One-Piece Check Valves
Features:
O-ring seal blow-out proof design
One piece body construction.
Working pressure up to 3000 psig (206 bar)
VP33A-
VP33B-
Basic Ordering
Number
End Connections
Inlet
Outlet
Cv
Dimensions mm (
)
inch
Hex.
L
M-4N-
M-4R-
F-4N-
F-4R-
MF-4N-
FM-4N-
M-8N-
F-8N-
MF-8N-
1/4 in. Male NPT
1/4 in. ISO Male Tapered
1/4 in. Female NPT
1/4 in. ISO Female Tapered
1/4 in. Male NPT
1/4 in. Female NPT
1/2 in. Male NPT
1/2 in. Female NPT
1/2 in. Male NPT
1/2 in. Male NPT
1/4 in. Female NPT
1/4 in. Male NPT
0.35
1.20
41 (
)
1.62
61 (
)
2.41
64 (
)
2.54
44 (
)
1.75
58 (
)
2.28
58 (
)
2.28
94 (
)
3.71
72 (
)
2.83
14.28 (
)
9/16
19.05 ( )
3/4
22.22 ( )
7/8
26.98 (
)
1-1/16
Table 2.
Spring Cracking, Reseal and Back Pressure @ 70 (21 )
Cracking Pressure Ranges
Min. Pressure
Max. Pressure
bar
0.02
0.07
1.72
0.69
10
25
psi
1/3
1
2.00
0.90
bar
0.21
0.28
29
13
psig
3
4
1.45
0.48
bar
0
0
21
psig
0
0
7
psi (bar)
6 to 20 (0.41 to 1.38) back pressure
5 to 20 (0.34 to 1.38) back pressure
3 to 10 (0.21 to 0.69) back pressure
Minimum 5 (0.34) Reseal pressure
VP33 Series Ordering Information and Dimensions
Material Grade/ASTM
SS316
/A276, A479
Brass 360
/B16
SS302/A313
NBR
Materials of Construction
Valve Body Materials
Stainless Steel
Brass
Component
Wetted parts are listed in
blue.
1. Body
2. Poppet
3. O-ring Holder
4. Locking Screw
5. O-ring
6. Spring
FKM
Lubrication:
Silicon-based Lubricant on Poppet
Molybdenum Dry Film Lubricant on SS316 Locking Screw.
Spring Nominal
Cracking Pressure
Designator
Reseal Pressures
3
Check Valves