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DOUBLE DOOR
CHECK VALVES
- 182 -
● ASME Class 150 rated check valves
● Wafer body style fits between FF or RF flanges
● Size 6" and larger are supplied with a valve lifting lug
● Upper and lower SS thrust washers
● Resilient Buna-N , Viton and metal seats
● Seat design lifts then swings discs to minimize seat
wear
● Shock bumpers minimize stresses in hinge pins
● Independent springs optimizes valve plate closing
rates while minimizing spring stress
● Dual rating 2" - 3" 150#, 300# and 600# Classes
● Dual ratings 4" 150# and 300# Classes
MODELS
● 150WTCT – Cast Steel Body, Stainless Steel Disc. Buna Seat
● 150WTTT – Stainless Steel Body, Stainless Steel Disc, Metal or Viton
Seat
O
PTIONS
● EPDM Seats
● Other Spring Material
A
PPLICABLE CODES
●ASME B16.34 ratings
● API 594
● API 598
Canadian Registration - OC10274.5C
150WT SERIES
CAST STEEL AND STAINLESS STEEL
DOUBLE DOOR CHECK VALVES
PRESSURES TO 285 PSIG (19.7 BARG)
T
EMPERATURES TO 600ºF (316ºC)
APPLICA TIONS
● Liquid and Air Service
● Process Industry
● Power Industry
● Chemical Industry
● Oil & Gas
● Pulp & Paper
● Metal & Mining
● Water & Waste
0800-150WTCTB-T
123456789101112131415
Inlet Size Dash Model Seat Dash Spring
150WT Series Ordering Code
Inlet Size - Position 1 - 4
0600 - 6"
0800 - 8"
1000 - 10"
1200 - 12"
Dash - Position 5
Model - Position 6 - 12
150WTCT - CS Body
150WTTT - SS Body
Seat* - Position 13
B - Buna-N (CS Body only)
M - Metal (SS Body only)
V - Viton (SS Body only)
Dash - Position 14
Spring - Position 15
T - SS
*150WTCT - Buna-N seat only
150WTTT - Viton or Metal seat
PRESSURE/TEMPERATURE CHART
ASME B16.34
2", 21⁄
2
", 3" sizes use 600WT Series.
4" size use 300WT Series
Buna Seats
Viton Seats
EPDM Seats
Metal Seats
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DOUBLE DOOR
CHECK VALVES
- 183 -
Connections: 6" to 12"
RF Wafer Flanged
150WT SERIES
CAST STEEL AND STAINLESS STEEL
DOUBLE DOOR CHECK VALVES
SPECIFICATION
Check Valve shall be dual disc design with Cast Steel or Stainless Steel Body
wafer body style designed to ASME B16.34 ratings and API 594. The check valve
shall have an integral cast bumper and Buna-N, Viton or metal seat with SS discs.
The check valve shall be ASME Class 150 rated. The spring shall be 316SS. The
seat design shall lift then swing discs to minimize seat wear . The check valve shall
be SSI 150WT Series.
M
ATERIALS OF CONSTRUCTION
Part Carbon Steel Stainless Steel
Body A216-WCB A351-CF8M
Discs A351-CF8M A351-CF8M
Seat Buna-N Viton or Metal
Spring 304 SS 304 SS
C
RACKING PRESSURE
Horizontal Mounting - .3psid
Vertical Mounting - .75 to 1.25 psid
Seats:
CS Body - 6" to 12" Buna-N
SS Body –6" to 12" Viton or Metal
Size A
1
B* C
2
DE
STUD SELECTION
Weight
Qty. Dia. Length
2
3
(50)
21⁄
2
(66)
3
3
(80)
4
4
(100)
63
7
⁄
8 8
3
⁄
4 5
3
⁄
8 6
5
⁄
8 1
3
⁄
8 8 3/4 8
1
⁄
4 35
(150) (99) (222) (137) (168) (35) (19) (210) (15.9)
85117
3
⁄8 85⁄8 2 8 3/4 93⁄4 70
(200) (127) (279) (187) (219) (51) (19) (248) (31.8)
10 53⁄4 133⁄8 91⁄2 103⁄4 27⁄8 12 7/8 11 114
(250) (146) (340) (241) (273) (73) (22) (279) (51.8)
12 71⁄8 161⁄8 111⁄4 123⁄4 33⁄8 12 7/8 121⁄4 180
(300) (181) (410) (286) (324) (86) (22) (311) (81.8)
1. Dimensions in accordance with API 594.
2. Minimum bore diameter of companion flanges.
3. Sizes 2", 21⁄2", 3" 150WT, 300WT & 600WT are interchangeable, use 600WT for all
applications in these sizes.
4. Size 4", 150WT & 300WT are interchangeable, use 300WT for 4" size.
* Add the “B” dimension and the diameter of the stud to achieve the ANSI B16.5 bolt hole
circle diameter.
DIMENSIONS inches (mm) AND WEIGHTS pounds (kg)
Use 2" 600WT-150# on page 191
Use 3" 600WT-150# on page 191
Use 4" 300WT-150# on page 187
Use 21/2" 600WT-150# on page 191
B
DC
E
A
Page 3
DOUBLE DOOR
CHECK VALVES
- 184 -
150WT SERIES DOUBLE DOOR CHECK VALVES
C
AST STEEL AND STAINLESS STEEL
Valve Size
(inches)
6 8 10 12
C
v
705 1795 2563 4295
10
100 1000 10000 100000
FLOW RATE (GPM)
PRESSURE DROP (PSID)
6
10
1
0.1
HORIZONTAL MOUNTED
VALVE CRACKING PRESSURE
8
10
12
(1) Pressure drop curves are based on water flow.
(2) Valve cracking pressure is equal to or less than 0.3 psid when mounted horizontally.
(3) Valve cracking pressure increases to between 0.75 and 1.25 psid when installed
vertically with flow upwards.
CVV
ALUES
(US-GPM @ 1 PSID)
PRESSURE DROP - AIR
Sizes 6" - 12"
(1) Pressure drop curves are based on air flow at 60 0F and 1 ATM pressure.
(2) Valve cracking pressure is equal to or less than 0.3 psid when mounted horizontally.
(3) Valve cracking pressure increases to between 0.75 and
1.25 psid when installed vertically with flow upwards.
Installation Note:
1) For correct installation and maintenance please see our I&M manual.
2) Horizontal installation – Disc pin
must be installed in vertical position.
3) Vertical installation (downward flow)
– Consult factory.
PRESSURE DROP - LIQUIDS
Sizes 6" - 12"
10
1
PRESSURE DROP (PSID)
6
HORIZONTAL MOUNTED
8
VALVE CRACKING PRESSURE
0.1
1000 10000 100000 1000000
FLOW RATE (GPM)
100
10
12
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