5 Maintenance
5.7 Heating/Cooling devices
The SRU pumps have the option of being fitted with heating/cooling devices.
These are primarily used for heating the pumphead so as to maintain the pumped media viscosity and reduce risk of any
crystallisation/solidification.
They may also be used for cooling purposes.
Saddle
Connections
Screw
for steam,
hot/cold fluid
Jacket
TD 243-087
Jackets can be fitted to the rotorcase cover and/or saddles can be fitted to the rotorcase.
The maximum pressure and temperature of heating/cooling fluid is 3.5 bar (50 psi) and 150°C (302°F) respectively.
Heating/cooling jackets and saddles should be in operation
approximately 15 minutes prior to pump start up and remain in
operation 15 minutes after pump shut down.
Assembly
1. Clean faces where sealant is to be applied
2. Apply Loctite 5970 silicone sealant or equivalent to face of heating jacket/saddle allow to dry for approx. 5-10 minutes.
3. Locate cap screws in jacket/saddle, and align screws with tapped holes in rotorcase/front cover and tighten evenly.
4. Allow instant gasket to cure fully before operation
SRU1 SRU2 SRU3 SRU4 SRU5 SRU6
Screw
Saddle (size/torque)
M4/2Nm M6/8 Nm M6/8 Nm M6/18 Nm M6/35 Nm M6/35 Nm
Jacket (size/torque)
M8/8 Nm M8/8 Nm M10/8 Nm M8/18 Nm M10/18 Nm M8/18 Nm
Flush connection
Saddle (BSPT)
1/8” 1/4” 1/4” 1/4” 1/4” 1/4”
Jacket (BSPT)
1/4” 1/4” 1/4” 1/4” 1/4” 1/4”
All flush connections are Female
35
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