Hand operated regulating valve
Type REG-SA and REG-SB 65
Designed for regulation purposes in liquid and expansion lines, suitable for MWP up to 65 bar
REG-SA and REG-SB are angleway and
straightway hand regulating valves, which act
as normal stop valves in closed position.
The valves are available in two dierent
versions – REG-SA and REG-SB designed for
regulation purposes in liquid and expansion
lines.
The valves are designed to meet the strict
quality requirements on refrigerating/heat
pump installations specied by the
international classication societies and are
carefully designed to present favourable ow
conditions and accurate linear characteristics.
REG-SA and REG-SB are equipped with vented
cap and internal backseating enables
replacement of the spindle seal whilst the valve
is active, i.e. under pressure.
AI367729279610en-000101
Hand operated regulating valve, type REG-SA and REG-SB 65
Features
• Modular Concept:
◦ Each valve housing is available with DIN and ANSI butt weld connection and in several dierent sizes.
◦ Possible to convert REG-SA or REG-SB to any other product in the FlexlineTM SVL family (shut-o valve, check &
stop valve, check valve or strainer) just by replacing the complete top part.
• Fast and easy valve overhaul service. It is easy to replace the top part and no welding is needed.
• Designed to ensure perfect regulation
• Internal backseating enables replacement of the spindle seal whilst the valve is active, i.e. under pressure.
• Easy to disassemble for inspection and possible repair.
• Acts as a normal stop valve in closed position.
• Housing and bonnet material is low temperature steel according to requirements of the Pressure Equipment
Directive and other international classication authorities.
• Exact capacity and setting of the valve can be calculated for all refrigerants by means of Coolselector™.
• Classication: DNV, CRN, BV, EAC etc. To get an updated list of certication on the products please contact your
local Danfoss Sales Company.
• Equipped with 42CrMo5 bolts to withstand high pressure.
• Service kits with replacement O-rings for R717 Heat Pump and R1270 Propylene include separate ID-ring for ID of
application
Media
Refrigerants
Applicable to HCFC, HFC, R717 (Ammonia), R744 (CO₂) and ammable refrigerants.
For further information refer to the product instruction for REG-SA and REG-SB.
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.
Hand operated regulating valve, type REG-SA and REG-SB 65
Table 6: Socket-Brazing ASME (ASME B16.50)
The design ts with all copper pipes having following tolerance to the nominal diameter.
Table 7: Tolerance for nominal diameter
Table 8: Available SVL products for 65 bar (943 psi)
(1)
(1)
To be used for SCA-X, CHV-X (all sizes) and REG-SA/SB (sizes 10 to 40).
To be used for SCA-X, CHV-X (all sizes) and REG-SA/SB (sizes 10 to 40).
x = Available
Design
Housing
Housing is Standard SVA angleway or straightway housing allowing other inserts from the SVL platform to be
installed. Material is special, cold resistant steel
Hand operated regulating valve, type REG-SA and REG-SB 65
The cone
The valves are available in two dierent versions – REG-SA with an A cone and REGSB with a B cone. The A cone is
designed for expansion lines, while the B cone is designed for regulating purposes e.g. liquid lines.
The valve cone is designed to ensure perfect regulation and provide an extensive regulating area. Irrespective of the
refrigerant used, it is easy to obtain the correct capacity. A cone seal ring provides perfect sealing at a minimum
closing momentum.
The valve cone can be turned on the spindle, thus there will be no friction between the cone and the seat when the
valve is opened and closed.
Spindle
The spindle is made of polished stainless steel, which is ideal for O-ring sealing.
Packing gland - REG-SA and REG-SB
The “full temperature range” packing gland ensures perfect tightness in the whole range: -60 °C /+150 °C (-76 °F /
+302 °F). The packing glands are equipped with a scraper ring to prevent penetration of dirt and ice.
Installation
Install the valve with the spindle up or in horizontal position. The ow must be directed towards the cone.
The valve is designed to withstand high internal pressure. However, the piping system in general should be
designed to avoid liquid traps and reduce the risk of hydraulic pressure caused by thermal expansion.
For further information refer to product instruction for REG-SA and REG-SB.
Figure 5: Example of marking ring, REG-SA
ID ring for special application
After converting a REG-SA/SB (DN 10-40) valve for Heat Pump/Propylene applications (replacing O-ring) the color
marked ID tag included in the service kit must be xed to the valve as shown in gure to the right.
The ID tag indicates the special application and identies the installed O-ring.