TRUMBULL INDUSTRIES, INC.
VALVE EXTENSION STEMS
Trumbull valve extension stems are
used to raise the elevation of both buried and "in-plant" valves having a
2" square operating nut.
The extension stem is made up of an extension rod (or pipe), a 2" square wrench nut
(or handwheel) at the top, and a wrench nut coupling at the bottom. The wrench nut
coupling fits over the 2" square nut of the valve stem being raised and is held to
the nut by a set screw threaded in the wrench nut coupling.
The wrench nut (or handwheel) and wrench nut coupling are pinned to the extension rod (or
pipe) which is drilled to receive steel pins. Both castings are ductile iron, grade
65-45-12.
The pinned connections permit the removal of the castings so the rod can slide through
Trumbull floor boxes and stem guides. Extensions can easily be shortened by cutting rod
and re-drilling for pin.
Extension stems normally furnished complete with rod, coupling, wrench nut (or handwheel),
set screw and pins; however, wrench nut and coupling are also available for separate sale
as listed under "Ordering Information". |
Photo illustrates Style B wrench nut
and wrench nut coupling. |
 |
Drawing illustrates Style A wrench nut
and wrench nut coupling.
|
ORDERING INFORMATION
FOR COMPLETE EXTENSION STEMS:
1. Quantity
2. Overall Length - See "A" dimension above.
Solid carbon steel rod and steel pipe are normally available in 20 foot and 21 foot
lengths respectively.
For longer lengths, stem couplings are required.
3. Type of Stem*: Solid rod or steel pipe.
4. For Solid Rod*: State diameter. Hot rolled carbon steel furnished unless otherwise
specified.
For Steel Pipe: State nominal pipe size. Sch 40 furnished unless otherwise specified.
5. Any Special Requirements, such as cold rolled solid rod, Sch 80 pipe, brass or
stainless stems, handwheels, or valve box centering rings.
* Note: For quickest delivery, order 7/8" solid carbon steel rod.
WHEN ONLY ORDERING COMPONENTS:
1. Quantity of wrench nuts, wrench nut couplings, handwheels and stem couplings.
Wrench nut and handwheel furnished with pin. Wrench nut coupling furnished with pin and
set screw.
2. Select wrench nut and wrench nut coupling from chart below, based on type and diameter
of extension being used.
EXTENSION STEM MATERIAL |
|
|
| SOLID ROD |
OR |
STEEL
PIPE |
STYLE* |
|
TOP
(WRENCH NUT) |
BOTTOM
(WRENCH NUT COUPLING) |
7/8"
1" or 1-1/8"
1-1/4" or 1-3/8"
1-1/2"
1-3/4"
2"
-- |
|
1/2"
3/4"
1".
1-1/4"
1-1/2"
--
2" |
"A"
"A"
"A"
"B"
"B"
"B"
"B" |
|
367-4953
367-4954
367-4955
367-4956
367-4957
367-4958
367-4959 |
367-4963
367-4964
367-4965
367-4966
367-4967
367-4968
367-4969 |
Above sizes normally in stock
* Wrench nuts and wrench nut couplings available in two styles: Style A for smaller
diameters and
Style B for larger diameters. See drawing on front.
HANDWHEELS: (Trumbull Item No. 367-4961):
Handwheels are 14" cast iron, with "open left" directional arrow, unless
otherwise specified.
Maximum stem o.d. of 2" for handwheels of standard production.
See separate literature on Trumbull floor boxes, stem guides and valve keys.
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