Danfoss DSV 10, DSV 1, DSV 2 Data sheet
Data Sheet
Change-over valve
Type DSV 10, DSV 1 and DSV 2
Highly reliable safety valves provides
lower capacity and more exibility
DSV 10, DSV 1 and DSV 2 are change-over
valves, which are designed to meet all
industrial refrigeration application
requirements.
DSV valves are designed specically for use
with double safety valve systems.
The valves are designed to give favourable ow
characteristics and are easy to dismantle for
servicing. The valve cone is designed to ensure
perfect closing, even with minimum torque the
valve will close eectively. All valves are
equipped with vented cap and nipple/ange
connections, which permit easy inspection or
replacement of safety valves.
AI183186425447en-001001
Change-over valve, Type DSV 10, DSV 1 and DSV 2
Features
• Applicable to HCFC, non ammable HFC, R717 (Ammonia) and R744 (CO2)
• Each valve type is clearly marked with type, size and performance range
• The valves and caps are prepared for sealing, to prevent operation by unauthorised persons, using a seal wire
• Can accept ow in both directions
• Housing and bonnet are made from low temperature steel according to requirements of the Pressure Equipment
Directive and other international classication authorities
• Max. operating pressure:
◦ DSV 10: 65 bar (943 psig)
◦ DSV 1 and DSV 2: 40 bar (580 psig)
• Temperature range:
◦ Temperature range: DSV 10, DSV 1 and DSV 2: -50 °C to 100 °C (-58 °F to 212 °F)
• DSV 10 when tted with 2 x SFA 10/SFA 10H or DSV 1 when tted with 2 x SFA 15/BSV 8 or DSV 2 when tted with
a combination of either 2 x SFA 15, or 2 x SFV 20, or 2 x SFV 25, meet the requirements according to EN13136
"Safety Valves Calculations" regarding max. 3% pressure drop in upstream line
• Classication: EAC etc. To get an updated list of certication on the products please contact your local Danfoss
Sales Company
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Change-over valve, Type DSV 10, DSV 1 and DSV 2
Media
Refrigerants
Applicable to HCFC, non ammable HFC, R717 (Ammonia) and R744 (CO2). Flammable hydrocarbons are not
recommended. The valve is only recommended for use in closed circuits.
For further information please contact Danfoss.
New refrigerants
Danfoss products are continually evaluated for use with new refrigerants depending on market requirements.
When a refrigerant is approved for use by Danfoss, it is added to the relevant portfolio, and the R number of the
refrigerant (e.g. R513A) will be added to the technical data of the code number. Therefore, products for specic
refrigerants are best checked at store.danfoss.com/en/, or by contacting your local Danfoss representative.
© Danfoss | Climate Solutions | 2021.02 AI183186425447en-001001 | 3
Description
Values
Temperature range
-50 °C to 100 °C (-58 °F to 212 °F)
Max. operating pressure
DSV 10: 65 bar (942 psig)
DSV 1 and 2: 40 bar (580 psig)
Change-over valve, Type DSV 10, DSV 1 and DSV 2
Product specication
Pressure and temperature
Table 1: Pressure and temperature
Design
Housing and bonnet
Made from special, cold resistant steel approved for low temperature operation.
Valve cone
A Teon tightening ring provides perfect sealing with a minimum closing torque.
Spindle
Made of polished stainless steel, which is ideal for O-ring sealing.
Packing gland
The "full temperature range" packing gland ensures perfect tightness in the whole temperature range: -50 °C to 100
°C (-58 °F to 212 °F). The packing gland is equipped with a scraper ring to prevent penetration of dirt and other
foreign bodies.
Installation
DSV are used as changeover valves between two SFA/BSV/SFV safety valves. When the spindle is turned clockwise
the inlet port C is connected to B. When the spindle is turned anticlockwise the inlet port C is connected to A. For
further information refer to installation guide for DSV.
Figure 1: Flow sketch
© Danfoss | Climate Solutions | 2021.02 AI183186425447en-001001 | 4
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