Sunvic
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Motorised Zone Valves

The motorised valve is probably the hardest working component in "wet" central heating systems. It is important to fit a name you can trust. Sunvic's long track record of innovation & reliability is that name.

2 Port MoMo 2 Port MoMo
  • 96% more efficient than S/R valves
  • Industry standard wiring
  • Replaces most brands of S/R valves
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3 Port MoMo 3 Port MoMo
  • 96% more efficient than S/R valves
  • Self cleaning shoe action
  • Actuator replaceable without draining system
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2 Port Spring Return 2 Port Spring Return
  • Spring return action
  • Actuator replaceable without draining system
  • NO & NC actuators available
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3 Port Spring Return 3 Port Spring Return
  • Actuator for mid position or diverter applications
  • Self cleaning shoe action
  • Revolutionary patented "Slipseal" action
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Questions About Our Products

What is the replacement for an SZ1301?

The replacement Part No. is SZ2301

What is replacement for SM3201/4201, SM3203/4203, SM3205/4205?

The replacement Part Numbers are SM5201, SM5203, SM5205, respectively

What is replacement for SD1701?

The replacement Part No. is SD2701. The Brown wire on the SD1701 has now changed to a White wire

Can I replace an SD actuator with a DM actuator, or vice versa?

It is not possible to do this as a SD actuator is spring return type and the DM actuator is power open/power close

I have an old SZ XXXX actuator. What is the current available equivalent

Old Model -----------> New Model

 

SZ 1201 ------------->  SZ 2201

SZ 1251 ------------->  SZ 2251

SZ 1301 ------------->  SZ 2301

SZ 1302 ------------->  SZ 2302

SZ 1351 ------------->  SZ 2351

SZ 1355 ------------->  SZ 2355

I have an old SD XXXX actuator. What is the current available equivalent?

Old Model -----------> New Model

 

SD 1601 ------------->  SD 2601

SD 1602 ------------->  SD 2602

SD 2626 ------------->  SD 2602

SD 1701 ------------->  SD 2701

SD 1751 ------------->  SD 2751

SD 1752 ------------->  SD 2752

 

Note: The Brown wire changes to a white wire on the 2000 series

I have an old SM XXXX actuator. What is the current available equivalent?

Old Model -----------> New Model

 

SM 3201 ------------->  SM 5201

SM 4201 ------------->  SM 5201

SM 3203 ------------->  SM 5203

SM 4203 ------------->  SM 5303

SM 3205 ------------->  SM 5205

SM 4205 ------------->  SM 5205

I have an old DM XXXX actuator. What is the current available equivalent?

Old Model -----------> New Model

 

DM 3601 ------------->  DM 5601

DM 4601 ------------->  DM 5601

DM 3651 ------------->  DM 5651

DM 4651 ------------->  DM 5651

I have a SZ 2301. What is the current available equivalent?

SZ 2301 are still available but these can be replaced by an SZM 1801

 


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