147 / 235
www.dklok.com
Valves
DK-LokTubeFittingCerti cationListing
DK-LokValveCerti cationListing
QualitySystemApprovals
No.V64-4
July 2013
V64 Series
PED Certified Relief Valves
Features
Operation
Factory Test
Pressure Equipment Directive 97/23/EC Certifications
When the inlet pressure overcomes the spring set pressure, it causes the valve to open, releasing flow to bypass and thereby bal-
ance the system pressure.
Every valve is factory tested for cracking
and reseal performance.
Module
B
D
Certificate No
HSBI-10-11-045
HSBI-10-11-046
3
4
5
6
7
8
17
18
19
1
9
10
11
12
13
14
15
16
2
V64 Series Technical Data
Working Pressure
Cracking Pressure Range
Orifice
Orifice Area
6,000 psig (413 bar)
15 to 5,500 psig (1.03 to 379 bar)
0.404 in. (10.26 mm)
0.128 in.2 (82.58 mm2)
Table 2.
Elastomer O-ring Technical Information
Component
Temp. Rating °F (°C)
Recommended Media
Min.
Max.
FKM (Viton)
-15 (-26)
400 (204)
Hydrocarbons, H
2
S, Mineral Oil/Grease, Silicone Oil/Grease, Fuels, Chlorinated Hydrocarbons.
HNBR
-25 (-31)
325 (162)
Hydrocarbons, CO
2
, Dilute Acids, Water and Steam Less than 300 °F.
EPDM -70 (-56)
250 (121)
Glycols, Organic Acids, Inorganic Acids, Hydraulic Fluids, Solvents.
•
Wide Media Applications :
Air, Gases, CNG, and Liquid relief applications.
• High Performance Soft Seat :
provides repetitive & reliable bubble-tight seal.
• Orifice
: 0.404 in. (10.26 mm)
• Working Pressure
: 6,000 psi (413 bar)
•
Cracking Pressure Range
:
15 to 5,500 psig (1.03 to 379 bar)
Valves are supplied with protective painted surface.
Table 1.
Materials of Construction
No.
Component
Valve Body Materials
Carbon Steel
Stainless Steel
1
Body
ASTM A216 Gr. WCB
ASTM A351 CF3M
2 Seat Frame
ASTM A105 or Equivalent
ASTM A479/A276 Type316
3 Cap
Carbon Steel
Stainless Steel
4 Cap O-Ring
Rubber
5 Jam Nut
Carbon Steel
Stainless Steel
6 Flat Washer
Carbon Steel
Stainless Steel
7 Bonded Seal
NBR inner ring bonded to carbon steel outer ring
8
Adjustable Screw
Carbon Steel with Cr Plated
Stainless Steel
9
Spring Keeper
Stainless Steel
10
Spring
AISI 1086 or Equivalent
11
Disc
ASTM A479/A276 Type316
12
Seat Cap
ASTM A479/A276 Type316
13
Seat Support
ASTM A479/A276 Type316
14
Seat O-Ring
FKM (see Table 2 for optional O-rings)
15
Insert Holder
ASTM A479/A276 Type316
16 Body O-Ring
FKM (see Table 2 for optional O-rings)
17 Lead Seal Wire
Stainless Steel
18 Name Plate
Stainless Steel
19 Rivet Bolt
Stainless Steel
• Wetted parts are listed in
blue
.