Style "WA" Valve Assembly FEATURES

Style "WA" Valve Assembly FEATURES
Sales Manual Section 160
PRODUCT SPECIFICATION STYLE `WA'
(For Temperature Regulator Service)
Style "WA" Valve Assembly
FEATURES
• Sizes 1/2" through 1 1/2"
• Three-way Type
• Rubber U-cup maintenance-free stem packing
• Quick-disconnect stem
GENERAL DESCRIPTION
These valves are especially suited for Temperature
Regulators for applications requiring opening one line and
closing another by operation of the regulator actuator to
which it is attached. Typical service is bypass, diverting,
blending and alternating hot-cold service
Valve stems of highly finished type 316 stainless steel
feature the quick-detach valve stem construction which
permits removal of the valve from the regulator without
disturbing the valve stem stroke adjustment in the
upperworks.
SPECIFICATIONS
Type: .................................................................... Three-way
Sizes: ........................................................1/2"through 1 1/2"
Action: ............ Modulating. Opens one line, closes another.
Connections:
Ports A and C ............................ Female threaded Unions
(Sil-braze unions available).
Port B ........................ Bottom cap threaded female, NPT.
Materials:
Valve Trim ..................................................Stainless steel
Valve Stem.................Type 316 St. St. Quick detach type.
Stem Packing ..............................................Rubber U-cup
Body ......................................................................... Brass
Unions ...................................................................Bronze
Other Parts ............................................................Bronze
With stem up, port B is open. With
stem down, port C is open.
Capacity, Cv
Size
A to B
A to C
1/2"
4.2
3.1
3/4"
7.8
5.6
1"
11.1
8.8
1 1/4"
23.5
18.1
1 1/2"
31.7
25.0
Note: Maximum factory test allowable leakage: 1 /2" to 1" sizes 0.05% of
rated valve capacity @ 50 PSI; l/4" and 1 1/2" sizes -0.05% of rated valve
capacity @ 20 PSI.
Maximum Valve Design Ratings:
(Supply Pressure and Allowable
Pressure Drop)
Max. supply pressure: .... 225 psi @ 100° F.
Max. temperature: ........ 400° F. @ 150 PSI.
Max. pressure drop:
1/2", 3/4" sizes ..100 PSI. 1" size - 75 PSI.
1 1/4", 1 1/2" sizes ....................... 50 PSI.
The supply pressure should not exceed the
above ratings. The recommended pressure
drops in the chart consider the unbalanced area
of the valve port, the valve design and the
power limit of the thermal element.
Type "WA" used with self-actuated temperature regulator series.
Maximum Recommended Pressure Drops, PSI*
SATR SERIES
Valve
Size,
RT-1001 RT-1003 RT-1004 RT-1006 RT-1007 RT-1008 RT-1009 RT-1011
In.
1/2
3/4
1
1 1/4
1 1/2
65
30
15
10
7
100
75
40
25
20
100
100
75
45
30
90
40
20
-
100
50
30
20
10
* Supply pressure to valve less any back pressure to the valve.
1
100
75
40
25
20
100
75
40
25
20
100
75
40
25
20
DIMENSIONS
Installation Dimensions:
Valve Size, In.
1/2
3/4
D*
1-9/16
1-7/8
L
2-1/8
2-7/16
E
4-3/4
6-3/16
* Subject to change without notice.
1
1-7/8
2-7/16
6-1/4
1 1/4
2-43/64
3-15/64
7-13/16
1 1/2
3-1/16
3-3/4
8-11/16
INSTALLATIONS
Alternating:
Figure 1. Showing how connections would be made where it is
desired to shift from heating service to cooling service by
manually opening and closing proper valves in the supply line.
Blending:
Figure 2. Illustrating a simple means for blending hot and cold
water where a rough mixing is suitable.
Diverting:
Figure 3. The drawing above illustrates the most widely used
method of cooling water control for internal combustion engines.
2
Q-4049 (4/95)
Printed in U.S.A.
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