Advanced Specialty Gas Equipment

Models UPH, UPHS
High Flow, High Purity, Balanced Stem Regulators

These metal diaphragm, single-stage regulators are specially designed for applications requiring both high flow and diffusion resistance. The main valve is balanced to minimize the effect of inlet pressure fluctuations on outlet pressure settings. The Model UPH is for noncorrosive gases; Model UPHS is suitable for use with corrosive gases.

Standard Features
  • High Flow Capacity capable of flow rates in excess of 60 scfm of air.
  • Stainless Steel Diaphragm minimizes diffusion of air into regulator and eliminates "off gassing" associated with elastomeric diaphragms, thus maintaining gas purity.
  • High Purity Regulator Design permits vacuum purging of regulator.
  • Balanced Poppet (stem) minimizes effect of changes in inlet pressure on delivery pressure settings.
  • Threaded Holes in Rear of Regulator permit front panel mounting.
Optional Features
  • Mounting Ring permits regulator to be panel mounted
  • Internal (Inboard) Helium Leak Test and Test Report determines inboard leak rate; test report certifies leak rate of less than 2 x 10-8 sccs air equivalent.
  • External (Outboard) Helium Leak Test and Test Report determines leak rate of gas from regulator to atmosphere; test report certifies leak rate of less than 5 x 10-7 sccs air equivalent.

Maximum Inlet Pressure

Inlet Pressure Gauge

Delivery Pressure Range

Delivery Pressure Gauge

Gauge Size: 21/2" Dial

Operating Temp. Range: -40°F to 140°F

Flow Coefficient: Cv = 0.6

Inlet Connection:
   UPH: CGA 296, 320, 326, 346, 350, 510, 540, 580,
     590, or 660 as ordered
   UPHS: CGA 290, 320, 326, 330, 346, 350, 510, 580,
     590, 660 or 705 as ordered

Outlet Connection: 1/4" NPT female

Supply Pressure Effect: <1.0 psi per 100 psi

Approximate Weight: 5 lbs

Materials of Construction
   UPH: Brass Bar Stock
  UPHS: Type 316 SS Bar Stock
   UPH: Brass
   UPHS: Type 316 Stainless Steel
Bonnet: Electroless Nickel-Plated Brass
Other Metal Parts Exposed to Gas:
  Type 316 Stainless Steel
Diaphragm: Type 316L Stainless Steel
Seals: PTFE

Table I

Part Number   Inlet
Pressure (psig)
Pressure (psig)
Brass. Stainless Steel   Max. Gauge Range Gauge
UPH-3-30-(CGA) UPHS-3-30-(CGA)   3000 0-4000 2-30 0-60
UPH-3-75-(CGA) UPHS-3-75-(CGA)   3000 0-4000 4-75 0-100
UPH-3-150-(CGA) UPHS-3-150-(CGA)   3000 0-4000 10-150 0-200
UPH-3-250-(CGA) UPHS-3-250-(CGA)   3000 0-4000 20-250 0-400
UPH-2-30-(CGA) UPHS-2-30-(CGA)   800 0-1000 2-30 0-60
UPH-2-75-(CGA) UPHS-2-75-(CGA)   800 0-1000 4-75 0-100
UPH-2-150-(CGA) UPHS-2-150-(CGA)   800 0-1000 10-150 0-200
UPH-2-250-(CGA) UPHS-2-250-(CGA)   800 0-1000 0-250 0-400
UPH-1-30-(CGA) UPHS-1-30-(CGA)   300 0-400 2-30 0-60
UPH-1-75-(CGA) UPHS-1-75-(CGA)   300 0-400 4-75 0-100
UPH-1-150-(CGA) UPHS-1-150-(CGA)   300 0-400 10-150 0-200
UPH-1-250-(CGA) UPHS-1-250-(CGA)   300 0-400 20-250 0-400
Where "(CGA)" is indicated above, insert appropriate Compressed Gas Association connection number to complete the part number. Example: UPH-3-30-580. Order by complete part number.

Optional Equipment

Equipment Part No.
Inboard Helium Leak Test and Test Report HT1000
Outboard Helium Leak Test and Test Report HT1001
Panel Mounting Ring* PM3803
Check Valves*
* If selected, these items are not installed on the regulator. They are shipped as separate items.
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