Data Sheet for Product

MVS661…N Modulating Refrigerant Valves Technical Instructions
for Ammonia (R717) and Safety Refrigerants Document Number 155-404
May 11, 2016
Siemens Industry, Inc. Page 9
Functional valve data
Permissible Operating pressure
1)
max. 914 psi (63 bar)
Maximum differential pressure pmax 363 psi (25 bar)
Valve characteristic Linear
Leakage rate (internally across seat) Max. 0.002% C
V
(K
Vs
) resp.
Max. 1 NI/h gas at p = 58 psi (4 bar)
Shut/off function, like solenoid
normally closed (NC) function
External seal Hermetically sealed
Permissible media Ammonia (R717), CO2 (R744) and all
safety refrigerants (R22, R134a, R404A,
R407C, R507, and so on). Not suited for
use with inflammable refrigerants
Media temperature -40°F to 248°F
(-40°C to 120°C), Max. 284°F (140°C) for
10 min.
Stroke resolution H/H100 1:1000 (H = Stroke)
Hysteresis Typically 3%
Mode of operation Modulating
Position when de-energized Closed
Orientation
2)
Upright to horizontal
Materials
Valve body and parts Steel/CrNi steel
Seat/piston CrNi steel
Sealing disk/O-rings PTFE/CR (chloroprene)
Pipe connections
Solder (weld-on-ends) Referring to EN 1092-1 and ASME
B16.25 schedule 40
Inner diameter 0.88 in (22.4 mm)
Outer diameter 1.33 in (33.7 mm)
Ambient conditions
Temperature -13°F to 131°F (-25°C to 55°C)
Humidity 10 to 100% rh
Miscellaneous
Weight 11.40 lb (5.17 kg)
Dimensions See Error! Reference source not
found.
Agency approvals
Degree of protection IP65 as per EN 60529
2)
Conforms to CE requirements
UL Certified to UL 873
cUL Certified to CSA C22.2 No. 24
Conforms to RCM requirements
Electrical safety EN 60730-1
Protection class Class III as per EN 60730
Pollution degree Degree 2 as per EN 60730
Vibration
3
EN 60068-2-6
5g acceleration, 10 to 150 Hz, 2.5 h
(5g horizontal, max. 2g upright)