Inline Check and
Relief Check Valves
These spring-operated poppet valves, with optional relief settings, allow free flow in only one
direction and prevent backflow - sometimes referred to as “backflow preventor”, “flow stop”, or
“non-return” valve. They are also used for relief and bypass functions.
Kepner’s Flexible Seal Seat
combines metal-to-metal contact with a resilient seal seat ensuring
dependable bubble-tight shutoff of liquid or gas, and long service life. Standard and specialty
valve designs handle a wide variety of applications.
Features and Benefits:
● Flexible Seal Seat
TM
for zero leakage (bubble-tight) sealing at
low and high pressures.
● O-Ring seal positively secured.
● Non-pressurized threads.
● Poppet stop inside valve body prevents spring from bottoming out.
● Generous flow passages allow full flow with minimal pressure drop.
Valve Specifications:
● Port Configurations: Pipe or Tube (NPT, JIC; 12 Combinations)
● Port Sizes: 1/8 inch to 3 inch (3.2 mm to 76 mm)
● Body Materials: Aluminum, Brass, Steel, 303 or 316 Stainless Steel
● O-Ring Seals: Buna-N, Neoprene, Teflon
®,
Viton
, EP, others available
● Temperature: -300F to 450F (-184C to 232C), O-Ring dependent
● Check Crack Pressure: 1 - 2 PSI (.07 bar to .14 bar)
● Relief/Check Crack Pressures: 5 PSI (.35 bar), 10 PSI (0.7 bar), 25 PSI
(1.7 bar), 50 PSI (3.5 bar) and 65 PSI (4.5 bar), others available
● Operating Pressure: to 3,000 PSI (207 bar)
● Flow: to 500 GPM (1893 LPM)
995 N. Ellsworth Avenue
Villa Park, IL 60181
Phone: 630-279-1550
FAX: 630-279-9669
www.kepner.com
Consult Factory or Distributor for more help. Customer/user is solely responsible to select products suitable for their specific application requirements
and to ensure proper installation, operation and maintenance of these products. Improper selection or use of products can cause personal injury or
property damage. All sales are subject to Kepner Products Company Standard Terms and Conditions of Sale. Design subject to change without notice.
19 IJIC - IJIC 7 JIC - MPT
17 JIC - IJIC 5 MPT - JIC
15 IJIC - JIC 4 FPT - FPT
13 JIC - JIC 3 MPT - MPT
11 JIC - FPT 2 FPT - MPT
9 FPT - JIC 1 MPT - FPT
IJIC IJIC JIC MPT
TUBE TO TUBE TUBE TO PIPE
JIC IJIC MPT JIC
TUBE TO TUBE PIPE TO TUBE
IJIC JIC FPT FPT
TUBE TO TUBE PIPE TO PIPE
PART NUMBER EXAMPLE
4 06 C - 1 - 25
JIC JIC MPT MPT
TUBE TO TUBE PIPE TO PIPE
JIC FPT FPT MPT
TUBE TO PIPE PIPE TO PIPE
FPT JIC MPT FTP
PIPE TO TUBE PIPE TO PIPE
PORT CONFIGURATIONS
Part Numbers: Fixed Settings 1/8” to 3” sizes
PORT SIZES
04 = 1/8 PIPE - 1/4 TUBE 16 = 1” PIPE - 1” TUBE
06 = 1/4 PIPE - 3/8 TUBE 20 = 1 1/4 PIPE - 1 1/4 TUBE
08 = 3/8 PIPE - 1/2 TUBE 24 = 1 1/2 PIPE - 1 1/2 TUBE
10 = 1/2 PIPE - 5/8 TUBE 32 = 2” PIPE - 2” TUBE
12 = 3/4 PIPE - 3/4 TUBE 48 = 3” PIPE (CONSULT FACTORY)
CONSTRUCTION MATERIALS
A = ALUMINUM D = 303 STAINLESS STEEL
B = BRASS i F = 316 STAINLESS STEEL
C = STEEL
O-RING SEALS
1 = BUNA-N
3* = TEFLON
®
9 = NEOPRENE
18 = VITON
®
25 = ETHYLENE PROPYLENE
OTHERS AVAILABLE
CRACK PRESSURE
“Blank”= 1-2 PSI
CRACK (Standard)
5 = 5 PSI CRACK
10 = 10 PSI CRACK
25 = 25 PSI CRACK
50 = 50 PSI CRACK
65 = 65 PSI CRACK
OTHERS AVAILABLE
Inline Check and
Relief Check Valves
995 N. Ellsworth Avenue
Villa Park, IL 60181
Phone: 630-279-1550
FAX: 630-279-9669
www.kepner.com
Consult Factory or Distributor for more help.
Customer/user is solely responsible to select products
suitable for their specific application requirements and to
ensure proper installation, operation and maintenance of
these products. Improper selection or use of products
can cause personal injury or property damage. All sales
are subject to Kepner Products Company Standard
Terms and Conditions of Sale. Design subject to change
without notice.
Inline Check and
Relief Check Valves
Flow Charts: Sizes 1/8” - 1”
Curves indicate Pressure Drop vs Flow Rate
FLOW - GALLONS PER MINUTE
Test Fluid: Water Test Temp: 50
o
F
PRESSURE DROP - PSI
SIZE CONNECTIONS
04 1/8” Pipe or 1/4” Tube
06 1/4” Pipe or 3/8” Tube
08 3/8” Pipe or 1/2” Tube
10 1/2” Pipe or 5/8” Tube
12 3/4” Pipe or 3/4” Tube
16 1” Pipe or 1” Tube
PRESSURE DROP - PSI
FLOW - GALLONS PER MINUTE
Test Fluid: MIL-H-5606A HYDRAULIC OIL Test Temp: 70
o
F
EXAMPLE WITH VARIOUS
RELIEF SETTINGS
995 N. Ellsworth Avenue
Villa Park, IL 60181
Phone: 630-279-1550
FAX: 630-279-9669
www.kepner.com
Consult Factory or Distributor for more help. Customer/user
is solely responsible to select products suitable for their
specific application requirements and to ensure proper
installation, operation and maintenance of these products.
Improper selection or use of products can cause personal
injury or property damage. All sales are subject to Kepner
Products Company Standard Terms and Conditions of Sale.
Design subject to change without notice.
Curves indicate Pressure Drop vs Flow Rate
PRESSURE DROP - PSI
SIZES: 1-1/4” 1-1/2” 2”
FLOW - GALLONS PER MINUTE
Test Fluid: Water Test Temp: 50
o
F
Inline Check and
Relief Check Valves
Flow Charts:
Sizes 1
1
/
4
” - 2”
PRESSURE DROP - PSI
SIZE CONNECTIONS
20 1-1/4” Pipe or Tube
24 1-1/2” Pipe or Tube
32 2” Pipe or Tube
FLOW - GALLONS PER MINUTE
Test Fluid: MIL-H-5606A HYDRAULIC OIL Test Temp: 70
o
F
EXAMPLE WITH VARIOUS
RELIEF SETTINGS
995 N. Ellsworth Avenue
Villa Park, IL 60181
Phone: 630-279-1550
FAX: 630-279-9669
www.kepner.com
Consult Factory or Distributor for more help. Customer/user is
solely responsible to select products suitable for their specific
application requirements and to ensure proper installation, opera-
tion and maintenance of these products. Improper selection or use
of products can cause personal injury or property damage. All
sales are subject to Kepner Products Company Standard Terms
and Conditions of Sale. Design subject to change without notice.
Dimensions: Model 100
Inline Check and
Relief Check Valves
NOTES BELOW REFER TO COLUMN “F”
1 1 1/2 FOR 316 STAINLESS STEEL
2 1 7/8 FOR 303 & 316 STAINLESS STEEL
3 2 3/4 FOR COMMERCIAL BRASS
Model 200
NOTES BELOW REFER TO COLUMN “F”
1 1 1/2 FOR 316 STAINLESS STEEL
2 1 7/8 FOR 303 & 316 STAINLESS STEEL
3 2 3/4 FOR COMMERCIAL BRASS
Model 300
ALL DIMENSIONS (IN INCHES) ARE FOR REFERENCE ONLY.
NOTES BELOW REFER TO COLUMN “F”
1 1 1/2 FOR 316 STAINLESS STEEL
2 1 7/8 FOR 303 & 316 STAINLESS STEEL
3 2 3/4 FOR COMMERCIAL BRASS
CONNECTION: G
CONNECTION: H
A
F HEX
E
D
C (REF)
B
CONNECTION: G
CONNECTION: H
A
F HEX
E
D
C (REF)
B
CONNECTION: G
CONNECTION: H
A
F HEX
E
D
C (REF)
B
B
995 N. Ellsworth Avenue
Villa Park, IL 60181
Phone: 630-279-1550
FAX: 630-279-9669
www.kepner.com
Consult Factory or Distributor for more help. Customer/user is solely responsible to select products suitable for their specific application requirements
and to ensure proper installation, operation and maintenance of these products. Improper selection or use of products can cause personal injury or
property damage. All sales are subject to Kepner Products Company Standard Terms and Conditions of Sale. Design subject to change without notice.
Inline Check and
Relief Check Valves
Dimensions: Model 400
NOTES BELOW REFER TO COLUMN “F”
1 1 1/2 FOR 316 STAINLESS STEEL
2 1 7/8 FOR 303 & 316 STAINLESS STEEL
3 2 3/4 FOR COMMERCIAL BRASS
ALL DIMENSIONS (IN INCHES) ARE FOR REFERENCE ONLY.
Model 500
NOTES BELOW REFER TO COLUMN “F”
1 1 1/2 FOR 316 STAINLESS STEEL
2 1 7/8 FOR 303 & 316 STAINLESS STEEL
3 2 3/4 FOR COMMERCIAL BRASS
Model 700
NOTES BELOW REFER TO COLUMN “F”
1 1 1/2 FOR 316 STAINLESS STEEL
2 1 7/8 FOR 303 & 316 STAINLESS STEEL
3 2 3/4 FOR COMMERCIAL BRASS
CONNECTION: G
CONNECTION: H
A
F HEX
E
D
CONNECTION: G
CONNECTION: H
A
F HEX
E
D
C (REF)
B1
B2
CONNECTION: G
CONNECTION: H
A
F HEX
E
D
C (REF)
B1
B2
995 N. Ellsworth Avenue
Villa Park, IL 60181
Phone: 630-279-1550
FAX: 630-279-9669
www.kepner.com
Consult Factory or Distributor for more help. Customer/user is solely responsible to select products suitable for their specific application requirements
and to ensure proper installation, operation and maintenance of these products. Improper selection or use of products can cause personal injury or
property damage. All sales are subject to Kepner Products Company Standard Terms and Conditions of Sale. Design subject to change without notice.
Inline Check and
Relief Check Valves
Dimensions: Model 900
ALL DIMENSIONS (IN INCHES) ARE FOR REFERENCE ONLY.
Model 1100
Model 1300
NOTES BELOW REFER TO COLUMN “F”
1 1 1/2 FOR 316 STAINLESS STEEL
2 1 7/8 FOR 303 & 316 STAINLESS STEEL
3 2 3/4 FOR COMMERCIAL BRASS
NOTES BELOW REFER TO COLUMN “F”
1 1 1/2 FOR 316 STAINLESS STEEL
2 1 7/8 FOR 303 & 316 STAINLESS STEEL
3 2 3/4 FOR COMMERCIAL BRASS
NOTES BELOW REFER TO COLUMN “F”
1 1 1/2 FOR 316 STAINLESS STEEL
2 1 7/8 FOR 303 & 316 STAINLESS STEEL
3 2 3/4 FOR COMMERCIAL BRASS
CONNECTION: G
CONNECTION: H
A
F HEX
E
D
C (REF)
CONNECTION: G
CONNECTION: H
A
F HEX
E
D
C (REF)
B
CONNECTION: G
CONNECTION: H
A
F HEX
E
D
C (REF)
B B
995 N. Ellsworth Avenue
Villa Park, IL 60181
Phone: 630-279-1550
FAX: 630-279-9669
www.kepner.com
Consult Factory or Distributor for more help. Customer/user is solely responsible to select products suitable for their specific application requirements
and to ensure proper installation, operation and maintenance of these products. Improper selection or use of products can cause personal injury or
property damage. All sales are subject to Kepner Products Company Standard Terms and Conditions of Sale. Design subject to change without notice.
Inline Check and
Relief Check Valves
Dimensions: Model 1500
ALL DIMENSIONS (IN INCHES) ARE FOR REFERENCE ONLY.
Model 1700
Model 1900
NOTES BELOW REFER TO COLUMN “F”
1 1 1/2 FOR 316 STAINLESS STEEL
2 1 7/8 FOR 303 & 316 STAINLESS STEEL
3 2 3/4 FOR COMMERCIAL BRASS
NOTES BELOW REFER TO COLUMN “F”
1 1 1/2 FOR 316 STAINLESS STEEL
2 1 7/8 FOR 303 & 316 STAINLESS STEEL
3 2 3/4 FOR COMMERCIAL BRASS
NOTES BELOW REFER TO COLUMN “F”
1 1 1/2 FOR 316 STAINLESS STEEL
2 1 7/8 FOR 303 & 316 STAINLESS STEEL
3 2 3/4 FOR COMMERCIAL BRASS
CONNECTION: G
CONNECTION: H
A
F HEX
E
D
C (REF)
B
CONNECTION: G
CONNECTION: H
A
F HEX
E
D
C (REF)
B
CONNECTION: G
CONNECTION: H
A
F HEX
E
D
995 N. Ellsworth Avenue
Villa Park, IL 60181
Phone: 630-279-1550
FAX: 630-279-9669
www.kepner.com
Consult Factory or Distributor for more help. Customer/user is solely responsible to select products suitable for their specific application requirements
and to ensure proper installation, operation and maintenance of these products. Improper selection or use of products can cause personal injury or
property damage. All sales are subject to Kepner Products Company Standard Terms and Conditions of Sale. Design subject to change without notice.