Language

DEV CHECK SERIES

FORGED
CHECK VALVE

Check valves are safety devices in piping and fluid systems that allow fluid (liquid or gas) to flow in one direction only and automatically block reverse flow. They are widely used in industrial and everyday piping to protect pumps and equipment, maintain system pressure, and prevent water hammer.

CHECK VALVES

Supports API 800/1500 and ANSI 150-4500 classes with sizes from 1/4" to 2". End connections include socket weld, threaded, butt weld, and flanged, with materials such as A105, A182 series (F5, F9, F11, F22, F304, F316, F304L, F316L, F321, F347, F51, F91), and A350-LF2. Swing checks are offered with renewable seats, and lift checks with integral seats.

CLASS
API 800, 1500 / ANSI 150, 300, 600, 900, 1500, 2500, 4500 / JIS 10K, 20K, 30K, 40K, 63K
Size
1/4", 3/8", 1/2", 3/4", 1", 1 1/4", 1 1/2", 2"
End Connection
Socket Welding, Threaded, Butt Welding, Flanged
Material
A105, A182-F5, A182-F9, A182-F11, A182-F22, A182-F304, A182-F316, A182-F304L, A182-F316L, A182-F321, A182-F347, A182-F51, A182-F91, A350-LF2
Feature
Swing Check — Bolted Cover Or Welded Cover Renewable Seat; Lift Check — Bolted Cover Or Welded Cover Integral Seat
LA1D-A105
A105
Drawing
MODELLA1D-A105
TYPELift Check
CLASSAPI 800
MaterialA105
CONN.Socket welding
FEATUREBolted cover
Size1/4"(8A) ~ 2"(50A)

Forged API 800 carbon steel lift check valve (socket weld)

LA2J-A105
A105 / 10K
Drawing
MODELLA2J-A105
TYPELift Check
CLASSJIS 10K
MaterialA105
CONN.Flanged(RF)
FEATUREBolted cover
Size1/4"(8A) ~ 2"(50A)

Forged JIS 10K carbon steel lift check valve (flanged RF)

LG1F-A105
A105 / 1500#
Drawing
MODELLG1F-A105
TYPELift Check
CLASSANSI 1500
MaterialA105
CONN.Socket welding
FEATUREPressure seal cover
Size1/4"(8A) ~ 2"(50A)

Forged ANSI 1500 carbon steel pressure seal cover lift check valve (socket weld)

LG1P-A105
A105 / 4500#
MODELLG1P-A105
TYPELift Check
CLASSANSI 4500
MaterialA105
CONN.Socket welding
FEATUREPressure seal cover
Size1/4"(8A) ~ 2"(50A)

Forged ANSI 4500 carbon steel pressure seal cover lift check valve (socket weld)

LA1D-F304
F304
Drawing
MODELLA1D-F304
TYPELift Check
CLASSAPI 800
MaterialA182-F304
CONN.Socket welding
FEATUREBolted cover
Size1/4"(8A) ~ 2"(50A)

Forged API 800 stainless steel lift check valve (socket weld)

LA2J-F304
F304 / 10K
Drawing
MODELLA2J-F304
TYPELift Check
CLASSJIS 10K
MaterialA182-F304
CONN.Flanged(RF)
FEATUREBolted cover
Size1/4"(8A) ~ 2"(50A)

Forged JIS 10K stainless steel lift check valve (flanged RF)

LG1F-F304
F304 / 1500#
Drawing
MODELLG1F-F304
TYPELift Check
CLASSANSI 1500
MaterialA182-F304
CONN.Socket welding
FEATUREPressure seal cover
Size1/4"(8A) ~ 2"(50A)

Forged ANSI 1500 stainless steel pressure seal cover lift check valve (socket weld)

LG1P-F304
F304 / 4500#
MODELLG1P-F304
TYPELift Check
CLASSANSI 4500
MaterialA182-F304
CONN.Socket welding
FEATUREPressure seal cover
Size1/4"(8A) ~ 2"(50A)

Forged ANSI 4500 stainless steel pressure seal cover lift check valve (socket weld)

REFERENCE

MODEL CODING

Model codes use Valve → Type → End Construction → Class as the base code, followed by a Material suffix. Size is specified separately.

Valve Type End Class Material
A ANGLE A BASIC 1 SW A 150 -F304 A182-F304
B BALL B YOKE WELDED 2 RF B 300 -A105 A105
G GLOBE C WELDED BONNET/COVER 3 FF C 600
L L/CHECK D LONG BONNET 4 RTJ D 800
S S/CHECK E CRYOGENIC 5 BW E 900
T GATE F BELLOWS 6 NPT F 1500
Y STRAINER G P.S.B/P.S.C 7 SW×NPT G 2500
H N.B P 4500
J Y-N.B H 5K
K NEEDLE J 10K
L 2-PIECE K 16K
N Y-P.S.B/Y-P.S.C L 20K
P WATER SEAL M 30K
N 40K
R 63K

Valve Valve category

A
ANGLE
B
BALL
G
GLOBE
L
L/CHECK
S
S/CHECK
T
GATE
Y
STRAINER

Type Construction type

A
BASIC
B
YOKE WELDED
C
WELDED BONNET / COVER
D
LONG BONNET
E
CRYOGENIC
F
BELLOWS
G
P.S.B / P.S.C
H
N.B
J
Y-N.B
K
NEEDLE
L
2-PIECE
N
Y-P.S.B / Y-P.S.C
P
WATER SEAL

End Construction End type

1
SW
2
RF
3
FF
4
RTJ
5
BW
6
NPT
7
SW × NPT

Class Pressure class

A
150
B
300
C
600
D
800
E
900
F
1500
G
2500
P
4500
H
5K
J
10K
K
16K
L
20K
M
30K
N
40K
R
63K

Material Suffix Material suffix

-F304
A182-F304
-A105
A105

EXAMPLE · TA2A-F304

Gate Valve · Basic Type · RF End · Class 150 · A182-F304

The material suffix follows the hyphen. Product size is shown separately in the SIZE field.