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Telescoping Valve
Suggested Specifications

General

Telescoping valves shall be in the quantity and sizes as specified in plans, schedule and/or specification. The valves shall be the product of a manufacturer having experience in the manufacture of similar sized telescoping valves for the design heads required by the specification. The telescoping valves shall be as manufactured by Coldwell-Wilcox Technologies, LLC of Cincinnati, Ohio.

Design

Liberal safety factor shall be used in design of all telescoping valves and associated equipment. Working stresses shall not exceed one fifth of the ultimate strength of the material. Telescoping valve shall be designed for installation in the structures shown on the plans and as specified.

Workmanship

All work shall be performed in accordance with the best modern practice for the manufacture of high-grade machinery. All parts shall have accurately machined mounting and bearing surfaces. All parts shall conform accurately to the design dimensions and shall be free of all defects in workmanship or material that will impair their service. Telescoping valves shall be completely shop assembled to insure the proper fit an adjustment of all parts.

Materials

All major component materials used in the construction of telescoping valves and appurtenances shall be the best suited for the application and shall conform to the following specifications.

Operator Nut

ASTM B584 Bronze

Stem

ASTM A276 Type 304(L) or 316(L) Stainless Steel
ASTM B98 Bronze

Bail Slip Tube

ASTM A276 Type 304(L) or 316(L) Stainless Steel

Floorstand

ASTM A126, Class B Cast Iron, A36 Steel,
ASTM A276 Type 304(L) or 316(L) Stainless Steel

Handwheel

ASTM A126, Class B Cast Iron, A36 Steel

Companion Flange

Cast Iron, Steel, 304 or 316 Stainless Steel

Fasteners

ASTM A276 Type 304 or 316 Stainless Steel
ASTM B98 Bronze

Seat

UHMW

Seal

Neoprene ASTMD2000 50-60 Durometer

Stop Collar

Bronze Alloy 954

Telescoping Valve

Telescoping valve shall be designed and sized per the specifications, schedule and /or drawings and shall fit the customer supplied flanged riser pipe. The telescoping valve shall consist of a manual or electric operator, floorstand, stem, bail, slip tube with anti-rotation device and 150 pound companion flange with integral neoprene wiper and UHMW seat. Slip tube can be supplied with bell mouth, V notch or plain top. Rising stem shall be supplied unless otherwise requested. Floorstand shall be straight for floor mounting or offset for top of wall mounting. A clear plastic stem cover with closed, open, 1/4, 1/2 and 3/4 position indicator decals shall be supplied for rising stem applications.

Operators

Operator shall be handwheel, handcrank or electric actuator, floorstand mounted. Hand wheel type operators shall be without gear reduction. Coldwell-Wilcox operators will have either single or double gear reduction. All components shall be totally closed with positive mechanical seals. Electric actuator or gearbox manufacturer shall be as selected by CWT or as specified by job specifications. Telescoping valve shall be manual or electric operator driven through an acme threaded operator sleeve to the keyed acme threaded stem, bail and slip tube assembly. Slip tube anti-rotation devise is standard on all CWT telescoping valves.

Painting

Steel and cast iron components shall receive manufacturer's standard Tnemec epoxy series N140-1255 pota-pox beige primer and Tnemec series 69 pond 28BL finish prior to shipment. Total system shall be 12-16 mils DFT.

Tnemec coal tar epoxy series 46H-413 finish or Tnemec potable epoxy series N140 pota pox finish are available as required. Coal tar epoxy total system shall be 20-26 mils DFT. Tnemec potable epoxy total system shall be 12-16 mils DFT.

Shop Testing

Each telescoping valve shall be fully assembled and shop inspected. Each valve shall be fully opened and closed to ensure that it operates freely and seals.

Installation

Installation shall be in complete accordance with manufacturer's instructions and recommendations. Anchor studs will be set in accordance with approved manufacturer's drawings.

Start-up and Test

Contractor shall make adjustments required to place system in proper operating condition. Contractor shall conduct functional field test of each telescoping valve in the presence of the owner's representative to demonstrate that each part and all components together function correctly.

Download a copy of this specifications document as a Word DOC or a PDF file.

 

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3040 Forrer Street • Cincinnati, Ohio 45209 • Phone: 513-758-1010 • Fax: 513-758-1002
Coldwell-Wilcox Technologies, LLC and Security Systems Equipment are owned subsidiaries of Cast-Fab Technologies, Inc.