Series UPR Pressure Regulator
Elastomer-free design provides highest available purity
Features/Benefits:
- Kynar PVDF body; no wetted metals or elastomers
- TFM convoluted diaphragm for maximum sensitivity without elastomers
- PVDF spigots or flare connections
- Maximum flow performance with minimal drop-off from set pressure
- Maximum inlet pressure 125 PSI
- Downstream pressure range 5 - 50 PSI; Specify Series UPRH for 50 - 100 PSI
Design:
The valve is constructed with no wetted metals or elastomers. The metal component (1-spring) is stainless steel and is isolated by an impervious barrier seal. Pressure is set by turning a plastic bolt to change the spring rate. Attachment to process is by fused bead-and-crevice-free Kynar PVDF spigots. Spigots are available to match any high purity pipe supplier.
Series UPR is a normally-open valve designed to reduce the inlet pressure to a pre-determined lower pressure downstream. Maximum inlet pressure is 125 PSI. When outlet pressure is at or below set pressure, the valve is fully open. As outlet pressure approaches the set pressure, the valve will begin to close.
Outlet pressure is applied via the TFM diaphragm against the non-wetted stainless steel spring. (TFM is a thermoplastic material. "Teflon," for example, is a brand name that markets TFM material) As downstream pressure rises, it forces the spring to compress and pulls the valve shaft up against the main orifice in the valve. This reduces the size of the opening and reduces pressure. When downstream pressure decreases, the spring is decompressed and forces the shaft away from the orifice, increasing the size of the opening and allowing pressure to rise to the set point. The spring is designed to "balance" the valve against downstream pressure.
Because Series UPR is designed for ultra-pure liquids, it will not close completely under any conditions. If the pipeline remains in a no-flow condition for any period of time, outlet pressure will ultimately rise to match the inlet pressure as pressure equalizes through the main orifice. If the application requires a mechanism for positive shutoff, Series UPR can be installed in conjunction with air-operated shut-off valve Series BSDA. Alternatively, Series PRH-U is a high-purity pressure reducing valve that offers positive shut-off. Series UPR may also be ordered with positive shut-off, however, that version requires use of elastomers and you may determine that the flow performance of PRH-U is advantageous for a valve that will close when required. Consult factory.
• Keep in mind that a pressure regulator cannot increase pressure. If upstream pressure drops below the set point, downstream pressure will also...a pressure regulator does not function like a pump.
• Pressure regulators will not function as backpressure regulators. Pressure regulators are normally-open valves that are used to prevent downstream pressure from exceeding a predetermined set point. In some applications this is known as forward pressure control. It is also commonly known as a pressure reducing valve. A "backpressure" regulator, on the other hand, is a normally-closed valve that controls pressure upstream, or "behind" the valve. For information on an ultra-pure backpressure regulator, refer to the PTFE version of Series RVDT.
Dimensions & Ordering Information:
| Dimensions | |||||||
Pipe Size (Spigot) |
|||||||
| UPR(series) 050(size) TF(seal material) - PF(body material) - N (spigot type; 1=Asahi, 2=GF) For shut-off design, please consult factory. For JIS sizes add -JIS suffix to part number. | |||||||
Flow Performance Curves:
Catalog Cut Sheet (please click here)
Installation Instructions
CAD Drawings:
Sample Specification:
Plast-O-Matic Valves, Inc.
1384 Pompton Avenue
Cedar Grove, NJ 07009 USA
Voice: (973) 256-3000
Fax: (973) 256-4745
Top
Kynar® is a registered trademark of Arkema.,
Corzan™ is a trademark of Noveon. Geon® is a registered trademark of the Geon Company. Teflon® is a registered trademark of EI DuPont de Nemours.
FAIL-DRY® is a registered trademark of Plast-O-Matic Valves, Inc.