User guide

Royal Series Water Temperature Control Units Page 17
Note: Use a backup wrench to support Royal Series system
piping when making process piping connections.
! CAUTION
All external valves, fittings, and hoses must be rated at a minimum of
150 psig and 250°F (1,034.25 kPa/10.34 bars and 121ºC).
The exception is when the temperature control unit
is optionally rated for 300ºF (149ºC) operation;
external valves fittings and hoses must then be rated at a minimum of
150 psig and 300ºF (1,034.25 kPa/10.34 bars and 121ºC).
3-4 Piping Considerations for Permanent
Installations
Sterling recommends an optional (or customer-installed) strainer
on the COOLING WATER IN inlet.
The unit must have at least 16 psig (110.32 kPa/1.1 bars) water
supply pressure to prevent pump cavitation that can be caused by
the water “flashing” to steam. To avoid damage to the pump or
other components, make sure that maximum supply pressure does
not exceed 55 psig (379.2 kPa/3.79 bars).
Keep restrictions to a minimum by using proper inlet pipe sizing. If
the water supply piping is larger than ¾”, reduce the size at the
unit. The table below contains the pipe sizes that are used in the
unit.
Pipe sizes for ¾ hp to 10 hp (0.56 kW to 7.46 kW) units
Location Size in inches NPT
To Process 1½”
From Process 1½”
Cooling Water In ¾”
Cooling Water Out
- depends on solenoid used -
Common black pipe is recommended for permanent installations.
Royal Series water circuit piping is primarily ferrous (iron) and
reacts electro-chemically with non-ferrous metallic materials such
as copper. Some water contains dissolved minerals that greatly
accelerates the reaction between dissimilar metals.