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OFV Pressure Regulating Valve
Brand: DanfossOFV are angle-way pressure regulating valves, which have ajustable opening pressure and cover the differential pressure range (∆P): 2 to 8 bar (29 to 116 psi).
The valve can be closed manually, e.g. during plant service and have backseating, enabling the spindle seal to be replaced with the valve still under pressure.
The valves are especially designed to prevent fluttering due to low velocity and/or low density. In consequence it is possible to apply the valves with wide fluctuations in capacity demands, i.e. from maximum performance to part load. A flexible o-ring provides perfect sealing over the seat.
Features- Applicable to HCFC, HFC, R717(Ammonia) and R744 (CO2)
- Full temperature range packing gland -50°/+150° C (-58°/+302° F)
- Maximum operating pressure: 40 barg (580 psig)
- Three functions in one valve. The OFV valve combines the functions of an overflow valve, a check valve and a stop valve
Specifications
Brand
Approvals & Certifications
- BV
- CE
- CRN - Canadian Registration Number
- DNV
- EAC
- PED 97/23/EC
Bonnet Material
- 304 Stainless Steel - X5CrNi18-10, EN 10088
- Bonnet, Insert: Stainless Steel
- Steel, P275 NL1, EN 10028-3
Cap Material
- Spindle Seal Cap: Aluminum
Cone Material
- Steel
Differential Pressure
- psi: 29 to 116 (kPa: 199.9 to 799.8, bar: 2 to 8) - Set Pressure
Enclosure, Body Material
- 304 Stainless Steel - X5CrNi18-10, EN 10088
- Steel, P285 QH, EN 10222-4, LFA350
Flange Material
- 304 Stainless Steel - X5CrNi18-10, EN 10088
- Steel - P275 NL1, EN 10028-3
Flow Rate
- Size 20: 0 to 0.14 m³/hour (Cv)
- Size 20: 0 to 0.52 m³/hour (Kv)
- Size 25: 0 to 0.40 m³/hour (Cv)
- Size 25: 0 to 1.50 m³/hour (Kv)
Gasket Material
- Gasket for Cap, Seal Cap Gasket: Nylon
Materials of Construction
- Guide & Distance Piece: Steel
Nut & Bolt Material
- Bolts: Stainless Steel - A2-70, Typical 308
O-Ring Material
- Cloroprene (Neoprene)
Operating Pressure
- psig: 580.2 (kPa: 4,000, bar: 40) - Max.
- psig: 754 (kPa: 5,200, bar: 52) - for OFV-SS
Packing Material
- Packing Gland: Stainless Steel
- Packing Gland: Steel
- Packing Washer: Aluminum
- Packing Washer: Non-Asbestos
Ring Material
- Sealing Ring: PTFE (Teflon)
Spindle Material
- 303 Stainless Steel - X8CrNiS18-9, DIN 1744, Typical 17, 683/13
Spring Material
- Spring & Spring Washer: Steel
Temperature Range
- OFV: -50° to 150° C (-58° to 302° F)
- OFV-SS: -60° to 150° C (-76° to 302° F)
Valve Size
- 3/4" to 1" (20 to 25 mm)
