5 available options – Sterlco Royal Series Compact Temperature Control Unit User Manual
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Royal Series Water Temperature Control Units
• Forward-facing liquid-filled To and From Process pressure
gauges
• Independent high temperature safety thermostat 
• Non-fused lockable rotary disconnect 
• Branch fusing 
• ¼” cooling solenoid valve on ¾ to 3 hp (0.56 to 2.24 kW) 
models; ½” slow-close cooling solenoid valve on 5, 7½, & 10 
hp (3.73, 5.60, & 7.46 kW) models 
• EPDM/NI-Resist pump seal 
• Adjustable low supply water pressure switch; factory-set at 
16 psig (110 kPa/1.1 bars)
• 150 psig (1,034 kPa/10.3 bars) pressure relief valve 
• Choice of 230 or 460 operating voltages 
• ¾” water supply and drain connections; 1½” process 
connections
• Automatic vent sequence 
• 3” (76 mm) casters 
• Operating range of 0ºF to 250ºF (-17ºC to 121ºC) 
• Three (3) -year parts and labor warranty at the factory; five 
(5) -year controller warranty, and limited lifetime warranty 
on wetted pump components and pump seal; subject to 
factory review 
1-5 Available
Options
Royal Series systems are available with options to tailor the unit to 
your requirements. Some are factory installed; some can be retro-
fitted in the field. Consult your Sterling sales representative for 
more information. Available Royal Series options include: 
• Controller with integral flow meter; with:
Up to 30 gpm (114 lpm) flow indicator
- or -
30 to 75 gpm (114 to 284 lpm) flow indicator
0-20 mA and 4-20 mA current control output
