Modulating Valve - MVS661

Product series: MVS661

The MVS661..N refrigerant valve is designed for modulating control of refrigerant circuits including chillers and heat pumps. It is suitable for use in expansion, hot-gas and suction throttle applications. In addition to ammonia (R717), the valve can handle all standard safety refrigerants, noncorrosive gases / liquids and CO2 (R744). It is not suited for use with inflammable refrigerants.

MVS661 can be controlled and supplied directly by a HBX vapor quality sensor or a HBSLC/HBSLT Level sensor. This reduce cabling cost, PLC programming cost and PLC hardware cost.

We recommend using the "Siemens Modulating Valve Selection Program" for calculating valve size [kW], which can be downloaded for free under the "Downloads" tab.

We recommend Siemens valves for evaporators larger than 150 kw when using ammonia.

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Product features
Applications
Specifications
Ordering code
Downloads

Product features

	One valve type for expansion, hot-gas and suction throttle applications
	Hermetically sealed
	Selectable standard interface DC 0/2...10 v or DC 0/4...20 mA
	High resolution and control accuracy
	Precise positioning control and position feedback signal
	Short positioning time (< 1 second)
	Closed when deenergized
	Robust and maintenance-free
	DN 25 with kvs values from 0,10 to 6,3 m3/h

Specifications

Drawing

Moduleringsventil

Mechanical drawings M2FP:

M2FP MECHANICAL DRAWINGS

Power supply
Loop from HBLC contoller	4-20 mA
Connection	3 x ø20,5 mm
Terminals	Screw terminals max 4 mm2
Output
Positioning	4-20 mA
Load	500 ohm
Reactiontime	1 s
Approvals
EMC	EN61000-6-2/3
Protection degree	Class III - EN 60730
UL standard	UL 873
CSA standard	C22.2 No. 24
PN class	PN50 - EN 1333
Mechanical specifications
Max. pressure	50 bar
Refrigerant temperature	-40...+120°C
Mounting	Horisontal or vertical
Weight	5, 17 kg
Protection degree	IP65 - EN 60529
Pipe connection	Ø33,7/22,4
Materials
Material - liquid parts	Steel / CrNi steel
Material - sealing	PTFE/CR

Ordering code

Part no.	Kvs [m3/h]	QoE [kW]*
Siemens MVS...0.16N	0,16	60
Siemens MVS...0.4N	0,4	150
Siemens MVS...1.0N	1	375
Siemens MVS...2.5N	2,5	940
Siemens MVS...6.3N	6,3	2365
Siemens MVS...0.16N-IP	0,16	60
Siemens MVS...0.4N-IP	0,4	150
Siemens MVS...1.0N-IP	1	375
Siemens MVS...2.5N-IP	2,5	940
Siemens MVS...6.3N-IP	6,3	2365
*Calculated value from the Siemens calculation program Te=-20, Tc=30. Superheat and subcooling 2K Refrigerant R717
IP is with integrated heater
We recommend using the "Siemens Modulating Valve Selection Program" for calculating valve size [kW], which can be downloaded for free under the "Downloads" tab

Spare parts

Siemens ASR61-IP Replacement electronics for MVS661 with heater		Valve insert ASR..N

Additional info
An exchangeable ASR..N valve insert allows for different	kvs-values with the same type of DN25 valve. In the event of service,	this insert can also be replaced on the plant

Mechanical spare part no.	Kvs [m3/h]	DN
Siemens ASR0.16N	0,16	25
Siemens ASR0.4N	0,4	25
Siemens ASR1.0N	1,0	25
Siemens ASR2.5N	2,5	25
Siemens ASR6.3N	6,3	25

Electronic spare part no.	Description	Additional info
Siemens ASR61	Replacement electronic part for Siemens MVS661
Siemens ASR61-IP	Replacement electronic part for Siemens MVS661-IP	With integrated heating element