Analytical Response t/a AR Controls
HPV - High Performance Valve
The Bray® HPV High Performance Valve PTFE, Conductive PTFE & UHMWPE 10 bar (150 psi)
For Corrosive Applications in the chemical industry which require PTFE,
Applications up to 200°C (392°F) with PTFE,
Conductive Applications where PTFE Electrostatic Discharge (ESD) protection is required,
Abrasive Applications involving chemicals or temperatures where UHMWPE is the preferred material.
The Series 22/23 HPV line of butterfly valves sets the new standard of reliability and innovation. Extensive field research and engineering have developed this state-of-the-art design which provides excellent shut off protection (bubble-tight shut off) and high Cv values.
The HPV is crafted in a variety of materials such as PTFE, Stainless Steel, UHMWPE and special alloys to fit a wide range of customer requirements. As with all Bray’s products, precision manufacturing and exceptional quality remain the keys to a proven record of long service life.
DISC The HPV PTFE disc has 3 mm (1/8") minimum thickness of pure, virgin PTFE encapsulated over the following metals:
50mm-300mm valves, PTFE encapsulated over 316 stainless steel
350mm -600mm valves, PTFE encapsulated over 17-4 PH SS.
A 316 stainless steel disc is also available in all valve sizes.
The disc design allows for a higher flow area than other typical PTFE valves. All discs are fully certified (DIN 50049 3.1.B) and marked accordingly for traceability.
BODY Bodies are two piece wafer or lug style and are epoxy coated. All bodies meet full ANSI Class 150 and DIN 3840 pressure ratings for hydrostatic requirements. Body materials are fully certified (DIN 50049 3.1.B) and marked accordingly for traceability.
NECK An extended neck design in all valve sizes allows for 50mm of piping insulation and provides easy access for mounting actuators.
UPPER STEM SEAL The upper stem seal serves to keep any environmental contaminants from entering the stem bore. Material is Buna-N as the standard or FKM as an option.
TOP STEM BUSHING A top stem bushing is provided to absorb actuator side thrusts and is acetal as standard or PTFE as an option. The stainless steel retaining ring at the top of the valve retains the bushing in position, even when the valve is installed upside down.
BEARINGS Two PTFE impregnated steel bearings are provided for precision alignment of the upper and lower stem.
BODY BOLTS are 316 Stainless Steel material.
BRAY’S UNIQUE STEM SEALING SYSTEM FEATURING THE SEAL CAPSULE DESIGN
The primary seal is achieved by an interference fit between the extra wide disc hubs and specially contoured seat.
SEAL CAPSULE (SECONDARY SEAL)
One key feature of the Bray HPV is the patented Seal Capsule that forms the secondary stem seal. This capsule fully isolates the valve body and stem from the line media. The Seal Capsule is made of a virgin PTFE enclosing the internal energizer. The capsule fits into grooves machined in the upper and lower disc hubs. When compressed between the disc and seat during assembly, the capsule becomes energized, exerting both upward and downward pressure on disc and seat surfaces.
This sealing design is simple, reliable and proven, yet it requires much fewer components than other valves that utilize large metal springs to squeeze the packing against the shaft.
FLANGE LOCATING HOLES
Locating holes in the wafer version provide quick and precise alignment during valve installation, eliminating disc interference with adjacent pipe I.D.
BODY SEALS (Bi-Directional)
Reinforced PTFE gaskets are placed between the body halves. These seals eliminate contamination from external environmental conditions and potential leak path from the line media.
A shoulder has been machined into the upper stem. The upper stem is coupled to the valve disc by Bray’s unique double “D” connection. The stem and the disc are pressed together during assembly to become one part, thus the design is a positive stem-to disc drive connection. Both upper and lower stem materials are 17-4 PH Stainless Steel.
The unique Bray Series 22/23 HPV seat design reduces seating/unseating torque and, at the same time, reduces wear on the contacting parts. Utilizing state-of-the-art engineering, optimal computer designed curvatures are machined into the inner seat area. The curvatures minimize contact forces between the disc and seat as the disc approaches, or opens from, the closed position. This unique seat geometry permits lower torques and reduces seat wear. To maintain the proper shape, the PTFE seats are fully machined after the initial moulding process. All seats are mill certified (DIN 50049 3.1.B) and are marked accordingly for traceability.
A resilient seat energizer extends completely around the seat, including the disc hub. This provides uniform force sufficient for bubble-tight shut off. The standard energizer material is silicone, FKM is available as an option.
ACTUATOR MOUNTING FLANGE AND STEM CONNECTION
Designed to comply with ISO 5211 for direct mounting of Bray power actuators and manual operators.
INTERNATIONAL FLANGE COMPATIBILITY
Bray’s Series 22 valve is a wafer version with flange locating holes, and the Series 23 is the companion lug version for full rated dead-end service.
A major design advantage of Bray valve product lines is international compatibility. These valves are compatible with most world flange standards. In addition the valves are designed to comply with ISO 5752 face-to-face and ISO 5211 actuator mounting flanges. Therefore, one HPV valve design can be used in many different world markets.
Bray’s complete range of valves, accessories and parts, all with worldwide compatibility offers the best in uniformity, economy and high performance in the industry today.
Due to a modular concept of design, all Bray handles, manual gear operators, pneumatic and electric actuators mount directly to Bray valves. No brackets or couplings are required.
As its standard product Bray offers Series 22/23 HPV valve bodies with a polyester coating, providing excellent corrosion and wear resistance to the valve’s body surface. The Bray polyester coating is a hard, gloss red finish. Chemical Resistance – resists a broad range of chemicals including: dilute aqueous acids and alkalies, salts, salt spray, petroleum solvents, alcohols, greases and oils. Offers outstanding resistance to humidity and water. Weatherability– outdoor proven resistant to ultra-violet radiation. Abrasion Resistance – excellent Impact Resistance –withstands impact without chipping or cracking.
Extensive testing has proven the Bray PTFE seat maintains a bubble-tight seal during temperature fluctuations throughout the pressure and temperature range of the valve. All Bray valves are tested to 110% of full pressure rating before shipment. Conductivity and other tests may be performed upon customer request.
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