Temperature Regulator RT-1004-Al Series Self-Actuated FEATURES

Temperature Regulator RT-1004-Al Series Self-Actuated FEATURES
Sales Manual Section 160
PRODUCT SPECIFICATION RT-1004-Al
Self-Actuated
Temperature Regulator
RT-1004-Al Series
FEATURES
1.
2.
3.
4.
5.
6.
7.
8.
Extra large two-ply, seamless bellows used for
greater operating power and closer control.
Chevron "Lifetime" stem packing made of Teflon*
or EPT Rubber U-Cup for water service.
Quick-detach valve stem construction permits easy
valve change.
Sturdy construction with cast iron frame.
Variety of sensing bulb forms and materials.
(See page 2).
Valves in wide range of sizes, actions, styles,
materials, etc. for many services. (see page 3).
Capillary selection (see page 2).
Setpoint adjustment wheel.
*Registered tradename of DuPont Company.
GENERAL
Without need for external power, Robertshaw
Self-Actuated Temperature Regulators (SATR) offer final
control of the temperature of a liquid, an air space or flow,
or gas flow for domestic, equipment, process, space, etc. on
heating or cooling service.
The SATR sensing bulb is installed in the medium being
controlled while the SATR valve is located on the supply
line of the medium used as the heating (steam, hot water) or
cooling (water, ethylene glycol, brine) agent. The SATR
regulates the heating or cooling medium flow to maintain the
desired temperature at the sensing bulb location. Robertshaw
SATR are usually cataloged to detail the two-way direct
acting (close on temperature rise) type valves for heating
service. Two-way reverse-acting (open on temperature rise)
and three-way valves are equally available for cooling
service.
The Robertshaw SATR series offers a selection of:
Throttling bands, Temperature Indication, Fail-safe to
prevent overheating, Manual Positioning in addition to
automatic control, Corrosive atmosphere resistant type,
Small overall size and instantaneous heat exchanger
service.
Most cataloged Robertshaw SATR specifications are
starting points from which many alternates to cataloged
capillary, sensing bulb, separable well and valve may be
FURNISHED TO MEET YOUR SPECIFIC application's
needs.
1
Extra power with
Narrow Throttling Band
HOW TO ORDER
1. Quantity
2. Size
3. Series Number
4. Setpoint and/or setpoint range
5. Capillary specs.
6. Sensing bulb specs.
7. Valve type, action, ends, etc.
8. Other features
9. Shipping & invoicing instructions.
RT-1004-Al SERIES
The RT-1004-Al series is a non-indicating design suited to
heating and cooling applications. The narrow throttling band
means that the RT-1004-A1 series is very sensitive to
temperature changes at the large sensing bulb. It is
particularly applicable where the storage capacity of medium
to be heated is great while the heating surface is relatively
small. The extra large bellows develops power for more
positive action on higher pressure drops on valve sizes
above two inches.
For cataloging and pricing purposes, the RT-1004-A1
series is detailed with direct-acting valves for heating service,
8 ft. capillary (copper with brass armor), 12B type (threaded
bushing) copper sensing bulb, cast iron frame and other
non-listed parts of non-ferrous metals. Alternate
specifications are available.
Valve size, Inches
1/2
3/4
1
1-1/4
1-1/2
2
2-1/2
3
4
Single Seated,
Double Seated.
Single Seated, Balanced
Valve Type, Direct-acting (closes with rising
Unbalanced
Semi-Balanced
temperature at bulb)
A
MA
MA
MA
MA
MA
FA
FA
RA
End Connections
Screwed Brass Unions
Flanged (Class 125 ANSI)
Valve Trim (poppet and seats), material
S.S.
S.S.
S.S.
S.S.
S.S.
S.S.
S.S.
S.S.
S.S.
Valve Stem (highly finished), material
S.S.
S.S.
S.S.
S.S.
S.S.
S.S.
S.S.
S.S.
S.S.
Stem Packing (spring loaded chevrons)
Teflon
Teflon Teflon Teflon Teflon
Teflon
Teflon
Teflon
Teflon
Body Material
Bronze
Bronze Bronze Bronze Bronze Cast Iron Cast Iron Cast Iron
Cast Iron
Body Rating, Pounds
225
250
250
250
250
175
175
175
175
Pressure Drop Limit, psi (For higher
125
250
250
250
250
100
100
90
70
pressures consult our representative)
Full open Cv
2.1
9.5
13.0
18.6
25.0
45.0
82.5
130.0
226.0
The RT-1004 Series is available with any of the setpoint adjustment ranges listed below. The range should be
selected so that the setpoint falls within the upper third of the range span.
0° - 35°F
20° - 60°F
45° - 80°F
65° - 105°F
95° - 140°F
110° - 150°F
145° - 190°F
160° - 195°F
185° - 220°F
190° - 225°F
Alternates include:
Capillary:
Length ............................................. 1 ft. to 50 ft. or more
Materials .......... Copper tube with brass armor (standard)
or 304 stainless steel tube with SS braid
Sensing Bulbs:
Type 12B .............................................. Copper (standard)
Type 12BP ............................................ 316 stainless steel
Type 12B or 12BP ............................ with dead extension
Type 54 ................Copper, externally finned, plain (54A),
Copper, externally finned, bushed (54J),
Copper, externally finned, flanged (54K)
Type 6 ............................................ Plain for open vessels,
Copper with copper tube and brass armor (6A,
316 SS with 304 SS tube and no braid (6AP)
Separable Wells (For sensing bulb protection or ease of
removal):
Material ................................................................ 316 SS
Type GA or GA with lagging extension ............................
(Mounting thread one size larger than bulb size)
NOTE: Bulb diameter on lagging
extension type is l-1/4" maximum.
Type GB .......... (Mounting thread same size as bulb size);
for bulb sizes up to 1-1/4" diameter.
Valves: ................ Types A, FA, MA, MAS, WA, WBI, WD
as illustrated.
220° - 255°F
240° - 275°F
255° - 295°F
VALVE SIZING
Valve sizing is critical to control and life of regulator.
Use Robertshaw's "Flo-Rule" Valve Sizing Slide Rule and
Cv chart or contact our representative or factory. The
application requirement can frequently be satisfied by one or
two sizes smaller valve than the supply pipeline size.
NOTE 1 - IMPORTANT - If valve seat leakage can
cause a problem or a hazard, the following should be taken
into account. Maximum leakage of new valves:
single-seated Types A, WA - 0.05% of full open valve
capacity; single-seated balanced Types MA, MAS - 0.01%
of full open valve capacity; Single seated Type WD – 1% of
full open valve capacity; double-seated Types FA, WBI 0.5% of full open valve capacity;. This leakage will usually
increase somewhat as the valve seats wear in service.
NOTE 2 - IMPORTANT - Damage to or failure of the
thermal element with loss of charge will ordinarily result in
the regulator going to the "cold" position. The stem moves
"up" (toward the bellows) - thus a "direct-acting" valve will
fully open, a "reverse-acting" valve will close, and a 3-way
valve will fully open the bypass port(s).
2
DIMENSIONS, SHIPPING WEIGHTS AND
SENSING BULB SIZES
Valve Size,
1/2
3/4
1
1-1/4
Inches
Direct-Acting
A
MA
MA
MA
Valve, Type
Shipping Wt., Lbs.
35
37
40
45
A
13-5/16 15-3/16 15-3/16 15-3/8
B
11-3/4 11-3/4 11-3/4 11-3/4
D
1-9/16 3-7/16 3-7/16 3-5/8
E
4-3/4 5-15/16 7-1/8
7-1/2
1-1/2
2
2-1/2
3
4
MA
MA
FA
FA
FA
8 FT. CATALOGED
50
85
105
130
15-7/8 16-11/16 16-I/2 16-1/2
11-3/4 11-3/4 11-3/4 11-3/4
4-1/8 4-15/16 4-3/4 4-3/4
8-1/2
7
7-3/4 8-5/8
8FT.
CATALOGED
160
17-9/16
11-3/4
5-13/16
10-1/4
Standard bulb for temperature ranges beginning at 120° F. or above.
G
1
1
1-1/4
1-1/4
1-1/4
1-1/4
H
18
18
18
18
18
24
T*
1
1
1-1/4
1-1/4
1-1/4
1-1/4
1-1/4
18
1-1/4
1-1/4
18
1-1/4
1-1/4
24
1-1/4
**Standard bulb for temperature ranges beginning below 120° F.
G
1-1/2
1-1/2
1-1/2
1-1/2
1-1/2
1-1/2
H
24
24
28
28
28
32
T*
1-1/2
1-1/2
1-1/2
1-1/2
1-1/2
1-1/2
1-1/2
28
1-1/2
1-1/2
28
1-1/2
1-1/2
32
1-1/2
* Standard pipe thread.
** Bulb sizes for ranges beginning below 120° F. are necessary to provide "cross-ambient" charge. This
assures operation with ambient temperature either above or below the control setting. Under some
conditions, smaller bulbs may be used with lower ranges. If the larger bulb cannot be used, consult the
factory or nearest representative.
SATR VALVES FOR RT-1004-Al SERIES
(See Valve Spec. Sheet for full details)
THREE WAY
TWO WAY
Style A
Union Ends
Single Seated
Unbalanced
Bronze Body
SS Trim
Direct Acting
Sizes 1/2" – 1"
Reverse Acting
Sizes 1/2" – 1-1/2"
Style MA & MAS
Single Seated
Fully Balanced
Direct Acting only
SS Trim
MA Sizes 3/4" – 1-1/2"
Union Ends
Bronze Body
MA Size 2"
Flanged
Bronze or C.I. Body
MAS Sizes 1" – 2"
Flanged
Steel Body
MAS Sizes 3/4" – 1-1/2"
Threaded Ends
Steel Body
Style FA
Double Seated
Semi-Balanced
Reverse Acting: 3/4" – 1-1/2"
Bronze Unions
Bronze Body
Bronze or Monel Trim
Reverse Acting: 2"
Flanged
Bronze Body
Bronze or Monel Trim
Reverse Acting: 2"
Flanged
Cast Iron Body
Bronze or SS Trim
Reverse Acting: 2-1/2" - 4"
Flanged
Bronze Body
Monel Trim
Reverse Acting: 2-1/2" - 4"
Flanged
Cast Iron Body
SS Trim
Direct Acting: 2-1/2" - 4"
Flanged
Cast Iron Body
SS Trim
3
Style WA
Union Ends (2)
Threaded End (Bottom)
Unbalanced
Sizes 1/2"- 1-1/2"
Bronze Body
SS Trim
Style WD
Balanced
Sizes 2" - 3"
Flanged
Bronze Body
Bronze Trim
Style WBI
Double Seated
Semi-Balanced
Size: 3"
Flanged
Cast Iron Body
Bronze Trim
Q-4038 (11/04)
4
Printed in U.S.A.
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