OFV20-PS40,OFV-DN25 Danfoss Pressure regulating valves

OFV20-PS40,OFV-DN25 Danfoss Pressure regulating valves product description

OFV are angle-way pressure regulating valves,
which have ajustable opening pressure and
cover the differential pressure range (∆P): 2
- 8 bar (29 - 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.

OFV20-PS40,OFV-DN25 Danfoss Pressure regulating valves Features

Applicable to HCFC, HFC, R717(Ammonia)
and R744 (CO 2 ).
• Full temperature range packing gland
• –50/+150°C (–58/+302°F)
• Maximum operating pressure:
40 bar g (580 psig)
• Three functions in one valve. The OFV
valve combines the functions of a pressure
reegulating valve, a check valve and a shut-off
valve
• Classification: DNV, CRN, BV, EAC etc.
To get an updated list of certification on the
products please contact your local Danfoss
Sales Company.
• Special features for OFV-SS
– Low temperature stainless steel housing and
bonnet
– Low temperature packing gland -60/+150°C
(–76/+302°F)
– Maximum operating pressure 52 bar
(754 psi g)

OFV20-PS40,OFV-DN25 Danfoss Pressure regulating valves Design

Connections
Available with the following connections:
• Welding DIN (EN 10220)
• Welding ANSI (B 36.19M)
Packing gland OFV
The “full temperature range” packing gland
consists of a double O-ring sealing arrangement
combined with permanent lubrication from a
grease reservoir. This ensures perfect tightness
throughout the whole range: –50/+150°C
(–58/+302°F).
Flexible O-ring provides perfect sealing over the
seat.
Packing gland OFV-SS
The stainless steel packing gland comprises a
spring loaded seal packing gland which ensures a
perfect tightness in the range:
-60/+150°C (-76/+302°F).
The packing glands are equipped with a scraper
ring to prevent penetration of dirt and ice into
the packing gland.
Pressure Equipment Directive (PED)
OFV valves are approved and CE-marked in
accordance with the Pressure Equipment
Directive - 97/23/EC.
For further details / restrictions - see Installation
Instruction
Installation
The valve is designed to resist very high internal
pressure, but as to the pipe system in general,
hydraulic pressure caused by thermal expansions
in entrapped refrigerants should be avoided. For
further information please see OFV installation
instruction.