Connections:
Available in threaded NPT or Class 300
RF flanges.
High-efficiency valves:
Valves are quiet and highly durable. Special
suction valves tolerating small amounts of
condensate are available.
O-ring seals:
Easy to install O-ring seals head and cylinder.
Ductile iron construction:
Cylinder and head are made of ductile iron
for maximum thermal shock endurance.
Self-lubricating PTFE piston rings:
State-of-the-art piston ring designs to
provide the most cost-effective operation
of compressors for non-lube service. The
step-cut design provides higher efficiencies
during the entire life of the piston ring.
Positively locked piston:
Simple piston design allows end clearance
to be precisely set to provide maximum
efficiency and long life.
Piston rod seals:
Seals constructed of PTFE incorporating
special fillers to maximize leakage control.
Spring loaded seal design self adjusts to
compensate for normal wear.
Nitrotec
®1
coated piston rods:
Impregnated nitride coating provides
superior corrosion and wear resistance.
Cast-iron crosshead:
Durable cast-iron crossheads provide
superior resistance to corrosion and galling.
Pressure-lubricated crankcase with filter:
Self-reversing oil pump ensures proper
lubrication regardless of directional rotation to
main and connecting rod bearings. Standard
10-micron filter ensures long-lasting bearing
life (not available on Model 91).
1
Registered trademark of TTI Group Ltd.
Chapter 1—Introduction
Construction Details—Model F291 Compressor
4
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