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206 / S206-PT / PTC Reduced Port, Double Chamber, Hydraulically Operated Valve

The 206-PT and 206-PTC series control valves are hydraulically operated by introducing or releasing water from the control chambers. PT and PTC valves have two operating chambers which are divided from each other by the diaphragm, and are separated from the flowing media by an adaptor plate.

206-PTC is an enhancement of the 206-PT and includes an internal drop check feature. This mechanical check provides non-slam closure on reverse flow, independently of the stem position or the pilot operation.

PT and PTC valves are usually combined with Singer Valve specific purpose pilots and accessories to provide control for a wide range of functions: typically pump control and solenoid control applications.

Refer to Main Valve Options and Pilots & Accessories to further customize the valve to suit specific applications.

Positive control, even with low operating pressure
Precise positioning
Internal drop check included on the PTC model
Available in globe and angle style

206 / S206-PT / PTC Reduced Port, Double Chamber, Hydraulically Operated Valve

Valve(s) shall be a hydraulically operated globe (angle) valve. The inner valve assembly shall be guided in two locations by means bearing bushings. The inner valve assembly shall be the only moving part and shall be securely mounted on a AISI 316 Stainless Steel stem.
The two operating chambers shall be separated from each other by the diaphragm and from the flowing media by an adaptor.
All pressure containing components shall be constructed of ASTM A536-65 / 45 /12 ductile iron. The flanges shall be designed to ANSI Class 150 or Class 300 standards. Flange drilling to ANSI shall be standard; however, ISO and other drillings shall be available upon request.
Valve(s) shall have a protective fusion bonded epoxy coating internally and externally. The protective fusion bonded epoxy coating shall conform to the ANSI / AWWA C116 / A21.16 (current version) specification.
Valve(s) 10 in / 250 mm and smaller shall provide smooth frictionless motion with actuation being achieved by the use of a flat style Buna-N / EPDM diaphragm. They shall be constructed of nylon fabric bonded with synthetic rubber. The diaphragms shall be fully supported through their full stroke and not be used as a seating surface.
Valve(s) 12 in / 300 mm and larger shall provide smooth, frictionless motion and maximum low flow stability with actuation being achieved by the use of the Singer rolling diaphragm technology. The diaphragms shall not be used as a seating surface.
The valve cover shall have a separate stem cap giving access to the stem for alignment check, spring installation and ease of assembly.
Bonnets shall be accurately located to bodies utilizing locating pins. Locating pins shall eliminate corrosion resulting from the use of uncoated ductile iron to ductile iron surfaces.
The AISI 316 Stainless Steel seat shall be bolted in place, utilizing Spiralock thread tapping technology. The AISI 316 Stainless Steel seat ring shall be easily replaceable without special tools.
The valve(s) shall form a drip-tight seal between the stationary stainless steel seat ring and the resilient disc, which has a rectangular cross-section and is retained by clamping on three and one half sides. The resilient disc shall be constructed of Buna-N or EPDM for normal service conditions.
All external fasteners shall be AISI 18-8 Stainless Steel with AISI 18-8 Stainless Steel washers. Mild steel studs or bolts will not be acceptable.
All repairs and maintenance shall be possible without removing the valve from the line. To facilitate easy removal and replacement of the inner valve assembly and to reduce unnecessary wear on the guide, the stem shall be vertical when the valve is mounted in a horizontal line.
Each valve shall be air tested prior to shipment. The standard test shall include leakage test, seat leakage test, and stroke test. Refer to IOM 622B for further details (contact Singer Valve). Where the set-point is provided, Singer Valve will preset the pilot. Further testing is available upon request at published rates within the capabilities of Singer Valve’s manufacturing facilities.
The valve(s) shall be covered by a minimum three year (3) warranty against defects in materials and workmanship. The stainless steel seat ring shall be covered by a lifetime replacement warranty.
The optional Internal Drop Check feature shall provide rapid, positive shut-off to prevent reverse flow, independent of the stem position or the pilot operation. When this option is included in a 206-PT valve, the model name becomes 206-PTC.
The valve shall be a Singer Valve model ____ (insert model number), refer to other respective catalogue sections for further details.