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Importance of correct selection / installation of Satchwell 3-port Valve Body to provide Mixing function or Diverting function.

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Importance of correct selection / installation of Satchwell 3-port Valve Body to provide Mixing function or Diverting function.

Picard Product_Support
‎2018-09-07 11:14 PM

on ‎2018-09-07 11:14 PM

Issue

Importance of correct selection / installation of Satchwell 3-port Valve Body to provide Mixing function or Diverting function.

Environment

Satchwell 3-port Valve Body to provide Mixing function or Diverting function in heating or cooling circuit.

 

Satchwell MB, MBF, MJF, MZ, MZF, MZX

Cause

Incorrect selection / installation  of Satchwell 3-port Valve Body to provide Mixing function or Diverting function may result in poor control, damage to the Valve Body, damage to the Valve Actuator or damage to the hydraulic installation.

Resolution

  1. Determine which of the following types of hydraulic circuit the Satchwell 3-port Valve Body is to be installed in.
    1. Constant Temperature Variable Volume (CT) circuit e.g. AHU Heating / Cooling Coil or Calorifier Coil 
    2. Variable Temperature Constant Volume (VT) circuit e.g. Radiator System
  2. For Constant Temperature circuit application install Satchwell 3-port Valve Body as follows :-
    1. MJF, MZ, MZF, MZX install in RETURN pipework.
      Port 3 - Connect to Bypass (IN)
      Port 2 - Connect to Coil Return (IN)
      Port 1 - Connect to System Return (OUT)
    2. MB, MBF install in RETURN pipework.
      Port 3 - Connect to Bypass (IN)
      Port 2 - Connect to Coil Return (IN)
      Port 1 - Connect to System Return (OUT)
      OR
    3. MB, MBF may alternatively be installed in FLOW pipework
      Port 3 - Connect to Bypass (OUT)
      Port 2 - Connect to Coil Flow (OUT)
      Port 1 - Connect to System Flow (IN)
  3. For Variable Temperature circuit application install Satchwell 3-port Valve Body as follows :-
    1. MJF, MZ, MZF, MZX install in FLOW pipework.
      Port 3 - Connect to Bypass (IN)
      Port 2 - Connect to Boiler Flow (IN)
      Port 1 - Connect to System Flow (OUT)
    2. MB, MBF install in FLOW pipework.
      Port 3 - Connect to Bypass (IN)
      Port 2 - Connect to Boiler Flow (IN)
      Port 1 - Connect to System Flow (OUT)
      OR
    3. MB, MBF may alternatively be installed in RETURN pipework
      Port 3 - Connect to Bypass (IN)
      Port 2 - Connect to System Return (IN)
      Port 1 - Connect to Boiler Return (OUT)

N.B.

It should be noted that the alternative installation methods are valid for the MB and MBF Valve Bodies due to the ROTARY SHOE construction of the MB and MBF

Similarly it should be noted that the alternative installation methods are not valid for the MJF, MZ, MZF and MZX Valve Bodies due to the PLUG AND SEAT construction of the MJF, MZ, MZF and MZX .

Failure to install MJF, MZ, MZF and MZX Valve Bodies correctly in the pipework may result in VALVE VIBRATION in the pipework caused by WATER HAMMER 

 

INSTALLATION OPTIONS - MJF, MZ, MZF and MZX

3-PORT PLUG AND SEAT VALVES MAY BE INSTALLED TO MIX IN THE FLOW

VALVE BODIES USE TWO “IN” PORTS (Ports 2 & 3) AND ONE “OUT” PORT(Port 1)

 

3-PORT PLUG AND SEAT VALVES MAY BE INSTALLED TO DIVERT (BY MIXING) IN THE RETURN

VALVE BODIES USE TWO “IN” PORTS (Ports 2 & 3) AND ONE “OUT” PORT(Port 1)

 

INSTALLATION OPTIONS - MB, MBF 

3-PORT ROTARY SHOE VALVES MAY BE INSTALLED TO MIX IN THE FLOW USING TWO “IN” PORTS (Ports 2 & 3) AND ONE “OUT” PORT (Port 1)

3-PORT ROTARY SHOE VALVES MAY BE INSTALLED TO MIX IN THE RETURN.USING ONE “IN” PORT (Port 1) AND TWO “OUT” PORTS (Ports 2 & 3))

3-PORT ROTARY SHOE VALVES MAY BE INSTALLED TO DIVERT IN THE RETURN USING TWO “IN” PORTS (Port 2 & 3) AND ONE “OUT” PORT (Port 1)

3-PORT ROTARY SHOE VALVES MAY BE INSTALLED TO DIVERT IN THE FLOW USING ONE “IN” PORT (Port 1) AND TWO “OUT” PORTS (Port 2 & 3)

 

RELATED INFORMATION - DIVERTING IN THE FLOW

It should be noted that some manufacturers produce 3-Port Plug and Seat Valve Bodies specifically designed to DIVERT in the FLOW.  Such Valve Bodies have 1 IN Port and 2 OUT Ports

 

Please check the latest catalog for current equipment.


 

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