The reverse-acting FR/FGR series valve is an inexpensive way to maintain optimum discharge temperatures for more efficient and economical use of your cooling media. Because of its reverse action design, the valve closes when fluid temperature drops below a preset temperature — effectively eliminating the inefficient discharge of low temperature cooling fluid.Controlled leakage* can be provided through the valve for constant, true temperature monitoring. The FR/FGR series valve is an economical way to maintain optimum operating temperature of equipment for maximum efficiency.

Note: Specify temperature between 35° and 255°F in 5°F increments. Differential from full open to full closed is typically 10° to 15°F. Valve opens/closes gradually.

Unit of Measure


NPT Thread Size

N/A 1/2 in

Valve Type

N/A FGR Series Automatic Control Valve

Port Size

N/A 3/8 in

Maximum Operating Pressure

N/A 200 psig

Flow Coefficient (Cv)

N/A 2.7

Valve Action

N/A Reverse

Body Material

N/A Stainless Steel

Dimensional Drawing

FR/FGR Schematic Figure 3
Dimension A1 N/A 3-1/2 in
Dimension B2 N/A 6-3/8 in
Dimension C3 N/A 7/8 in

Net Weight

N/A 5 lb

Typical Applications

N/A Any other application requiring removal of heat with any circulating fluid compatible with bronze or stainless steel Compressor Cooling Water Cooling Drums or Rolls Engine Cooling Water Heat Exchangers Platens Scald protection for emergency safety shower

The Ogontz Guarantee

N/A We will repair or replace on a no-charge basis, FOB Willow Grove, PA, any valves or traps returned to us within 18 months, if found to be defective in material or workmanship.

Plug Material

N/A PTFE Silicone

Optional Standard Leak Ports

N/A LX - 1/4 to 1/2 GPM at 60 PSIG LZ - 1/2 to 1 GPM at 60 PSIG
  • 1 ±1/8 in Tolerance
  • 2 ±1/8 in Tolerance
  • 3 ±1/8 in Tolerance