128 / 235
Table 1.
Spring Cracking, Reseal and Back Pressure @ 70 (21 )
V33 Series Ordering Information and Dimensions
Stainless Steel
Brass
Material Grade/ASTM
SS316
/A276, A479
Brass 360
/B16
SS302/A313
NBR
NBR
Material of Construction
Valve Body Materials
Component
1. Body
2. Connector
3. Poppet
4. O-ring*
5. Spring
6. O-ring seal
V33 Series Poppet Check Valves
Feature: Working pressure up to 3000 psig (206 bar)
Basic Ordering
Number
End Connections
Orifice
mm ( )
in.
Cv
Dimensions mm ( )
inch
Inlet
Outlet
h-Hex
H-Hex
L
l
V33A-
V33B-
V33C-
V33D-
V33E-
V33F-
D-2T-
M-2N-
F-2N-
D-4T-
D-6M-
MD-4N4T-
M-4N-
F-4N-
D-6T-
D-10M-
M-6N-
F-6N-
D-8T-
D-12M-
M-8N-
F-8N-
D-10T-
D-12T-
M-12N-
F-12N-
D-16T-
M-16N-
F-16N-
4.8
(
)
0.19
7.1
(
)
0.28
10.0
(
)
0.39
13.5
(
)
0.53
16.0
(
)
0.63
18.0
(
)
0.71
0.16
0.47
1.48
1.7
2.6
5.2
8.0
15.88 ( )
5/8
19.05 ( )
3/4
22.22 ( )
7/8
28.58 (
)
1-1/8
31.75 (
)
1-1/4
34.93 (
)
1-3/8
41.28 (
)
1-5/8
11.11 (
)
-
-
14.29 (
)
14.00
14.29 (
)
-
-
17.46 (
)
19.00
-
-
22.22 ( )
22.00
-
-
25.40 ( )
28.58(
)
-
-
38.1 (
)
-
-
7/16
9/16
9/16
11/16
7/8
1
1-1/8
1-1/2
55.60 (
)
2.19
44.40 ( )
1.75
46.50 (
)
1.83
60.00 (
)
2.36
56.40 (
)
2.22
53.40 (
)
2.10
56.80 (
)
2.24
65.50 (
)
2.58
55.50 (
)
2.19
63.80 (
)
2.51
80.20 (
)
3.16
74.40 (
)
2.93
84.70 (
)
3.33
91.80 (
)
3.61
110.70 (
)
4.35
105.30 (
)
4.15
103.00 (
)
4.06
121.10 ( )
4.77
116.20 (
)
4.57
111.40 (
)
4.39
25.00 (
)
0.98
-
25.00 (
)
0.98
-
27.10 (
)
1.07
-
36.20 (
)
1.43
-
48.10 (
)
1.89
67.00 (
)
2.64
-
68.40 (
)
2.69
bar
psi
bar
psi
bar
psi
0.02
1/3
0.21
Up to 6 (0.41) Back pressure
3
0
0
0.07
1
Up to 6 (0.41) Back pressure
0.28
4
0
0
Up to 4 (0.28) Back pressure
0.21
3
0.48
7
0.14
2
0.69
10
Minimum 3 (0.21) Reseal pressure
1.03
15
0.48
7
1.72
25
Minimum 17 (1.17) Reseal pressure
2.07
30
1.38
20
3.45
50
Minimum 35 (2.41) Reseal pressure
4.14
60
2.76
40
5.17
75
Minimum 53 (3.65) Reseal pressure
6.20
90
4.14
60
6.89
100
Minimum 70 (4.82) Reseal pressure
8.27
120
5.51
80
psi (bar)
Cracking Pressure Ranges
Min. Pressure
Max. Pressure
Spring Nominal
Cracking Pressure
Designator
Reseal Pressures
FKM
FKM
Silicon-based Lubricant for Poppet.
Molybdenum Dry Film Lubricant for SS316 Body Threads.
1/8 in. Dk-Lok
1/8 in. Male NPT
1/8 in. Female NPT
1/4 in. Dk-Lok
6 mm Dk-Lok
1/4 in. Male NPT
1/4 in. Female NPT
3/8 in. Dk-Lok
10 mm Dk-Lok
3/8 in. Male NPT
3/8 in. Female NPT
1/2 in. Dk-Lok
12 mm Dk-Lok
1/2 in. Male NPT
1/2 in. Female NPT
5/8 in. Dk-Lok
3/4 in. Dk-Lok
3/4 in. Male NPT
3/4 in. Female NPT
1 in. Dk-Lok
1 in. Male NPT
1 in. Female NPT
1/4 in. Male NPT
1/4 in. Dk-Lok
Wetted parts are listed in
.
4. O-ring* on V33E & V33F Series is secured in poppet groove.
Lubrication :
blue
Operation
Valves that have not been actuated for a period of time may require a higher cracking pressure than
the set cracking pressure.
DK-LOK check valves prevent reverse flow in circuits. Do not use them as relief valves.
DK-LOK check valves are designed to prevent loss of media caused by failed connections and for
uni-directional flow control of fluids in chemical processing, power generation, oil and gas industries.
V33 series
Working pressure up to 3000 psig (206 bar)
Factory Test, Cleaning and Packaging
Every valve is factory tested for cracking and reseals performance.
Every valve is cleaned, and packaged in accordance with DK-LOK cleaning standard of DC-01.
Special cleaning and packaging in accordance with DK-LOK DC-11 in compliance with
ASTM G93 Level C is available on request.
2
Check Valves
Έ
2001-2011, DK Tech Corporation, All right reserved.
Model Shown:
V33 Series Check Valves
V33C-D-8T-10-S
V33C-F-6N-EP-1/3-S