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 drive pins. The wrench nut and wrench nut couplings are available in either ductile iron, grade 65-45-12, or stainless steel, Type 316.
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 the stem and re-drilling for the pin.
Extension stems are 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".

ORDERING INFORMATION
FOR COMPLETE EXTENSION STEMS:

1. Quantity
2. Overall length
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 specify diameter. Hot rolled carbon steel furnished unless otherwise specified.
For steel pipe specify nominal pipe size. Schedule 40 pipe is furnished unless otherwise specified.
5. For top nut and bottom coupling specify material type: ductile iron, grade 65-45-12, or stainless steel, type 316.
6. Any special requirements such as cold rolled solid rod, Schedule 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 top nuts, bottom couplings, handwheels and stem couplings.
The top nut and handwheel is furnished with pin; bottom couplings are furnished with pin and setscrew.
2. For ductile iron top nut and bottom coupling select from chart below, based on type and diameter of extension being used. Stainless steel top nut and bottom coupling are normally furnished to fit 1-1/4" solid rod or 1" Schedule 40 pipe. Specify if larger bore sizes are required, up to a maximum of 2".

Trumbull Industries, Inc., PO Box 1556, Youngstown, OH 44501. Tel: 330-799-3333; Fax: 330-797-3215.