Product Manual

Section 3
ShopTek™ ST45, ST55, ST75 (U.S.A. & Mexico) Operation & Maintenance Manual 3: Specifications
88292021-240 R01
Subject to EAR, ECCN EAR99 and related export control restrictions. 21
Specifications
3.1 Machine specifications
3.2 Lubricant specifications
The oil used as a lubricant in Sullair’s rotary screw com-
pressors must have the following properties:
•Low foaming
• Good resistance to emulsification
• High oxidation resistance
• Viscosity of 10.5 cSt at the compressor’s oper-
ating temperature
Table 3-1: Compressor specifications
Model ST45 9 bar ST55 9 bar ST75 9 bar
Rated pressure 9 bar (125 psi) 9 bar (125 psi) 9 bar (125 psi)
Maximum working pressure 9.3 bar (135 psi) 9.3 bar (135 psi) 9.3 bar (135 psi)
Relief valve setpoint 10 bar (145 psi) 10 bar (145 psi) 10 bar (145 psi)
Voltage & frequency 460 V / 60 Hz
Air end type Single stage, oil injected rotary screw
Configuration Gear driven with external inlet modulation
Motor type ODP (IP23)
Motor rating 45 kW (60 hp) 55 kw (75 hp) 75 kW (100 hp)
Motor nominal speed 1775 rpm 1775 rpm 1775 rpm
Starting mode Y-∆ (Y-delta)
Service factor 1.25
Ambient temperature Between 4° and 40°C (40° and 104°F)
Lubricant Sullube®
Lubricant volume 33 L (8.7 gal)
Service connector NPT 2″
Moisture drain connector NPT ½″ (moisture separator shipped loose)
Machine weight 1563 kg (3446 lbs) 1708 kg (3765 lbs) 1822 kg (4017 lbs)
Machine dimensions (L × W × H) 2200 × 1260 × 1760 mm (86.6 × 49.6 × 69.3 in)
Package dimensions (L × W × H) 2350 × 1345 × 1975 mm (92.5 × 53.0 × 77.8 in)
Table 3-2: Lubricant specifications
Synthetic oils Ambient temperature
Sullube® (factory fill) Up to 40°C (104°F)
WARRANTY INFORMATION
Mixing of fluids other than Sullube will void the
compressor’s warranty.