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  WATTS 69-0015-2131-3131-4131-UK
 
  Valves - Fan Coil Valves (Series 2131 / Series 3131 / Series 4131)
   
 
  Main Features
Complete range in the following versions :
2-way - DN: 1/2”, 3/4”, 1”
3-way - DN: 1/2”, 3/4”, 1”
3-way with 4 ports - DN: 1/2”, 3/4”

The 3-way version and the 3-way versions with 4 ports can be used as diverting or mixing valves of compact size and reduced weights. The valves are motorized with actuators series 22C or actuators with stroke 2.5 mm with ring nut M30x1.5.
 
Fan-coil control valves series 2131, 3131, 4131 are used for controlling the flow of hot or cold water in heating and air conditioning systems. They are operated by electric actuators with max. stroke of 2.5 mm. such as electrothermic actuator series 22C.

As standard, the valves are available in the configuration with male thread in the following versions :
• 2-way series 2131
• 3-way series 3131
• 3-way with 4 ports series 4131 with built-in by-pass.

Operation of the valve plug is by electrothermic actuator series 22C, available in the following versions:
• NO (normally open) 2-wire(Standard) or 4-wire (with auxiliary microswitch contact)
• NC (normally closed) 2-wire (Standard) or 4-wire (with auxiliary microswitch contact)
All actuators of the 22C series can easily be fastened to the valve body with a threaded ring nut. (M30x1.5).
 
2131

Two-way brass valve for fan-coils.
ON/OFF operation with actuators series 22C.
Max. operating temperature: 100°C. Disc stroke: 2.5 mm.
Nominal pressure: 16 bar.
Type Part number Dn Kvs Weight (g)
2131 213112 1/2" MM 1,7 200
2131 213134 3/4" MM 2,8 200
2131 21311 1" MM 4,5 500
 
 
  3131

Three-way brass valve for fan-coils. ON/OFF operation with actuators series 22C. Max. operating temperature: 100°C. Disc stroke: 2.5 mm. Can be used both as mixing and diverting valve, except for version 31311 which can only be used as diverting valve. Nominal pressure: 16 bar.

The Kvs and by-pass Kvs values given in the table alongside refer to the valve used for diverting service.
Type Part number Dn Kvs Kvs By-bass Weight (g)
3131 313112 1/2" MM 1,7 1,3 200
3131 313134 3/4" MM 2,8 1,8 250
3131 31311 1" MM 4,5 4,5 550
 

VU

Tee fitting for creating by-pass in valves series 3131 (Dn 1“).

 
 
  4131

Three-way brass valve with 4 connections for fan-coils. ON/OFF operation with actuators series 22C. Max. operating temperature: 100°C. Disc stroke: 2.5 mm. Can be used both as mixing and diverting valve. Nominal pressure: 16 bar.
The Kvs and by-pass Kvs values given in the table alongside refer to the valve used for diverting service.
Type Part number Dn Kvs Kvs By-bass Weight (g)
4131 413112 1/2" MM 1,7 1,3 350
4131 413134 3/4" MM 2,8 1,8 400
 

840

Soft sealed union with nut for zone valves series 2131, 3131, 4131.

Type Part number Dn Weight (g)
840 8401212GAS 1/2" X 1/2" 50
840 8403434GAS 3/4" X 3/4" 50
840 84011GAS 1" X 1" 50
 
 
 
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