Appendix B—Specifications for Vertical Double-Acting Model D891/FD891
Features and Benefits
Self-lubricating piston rings: Non-lubricated operation to minimize oil in gas
Multiple materials and configurations: Versatility for your application
Multiple mounting configurations: Versatility for your application
High efficiency valves: Quiet, reliable operation
Reversible oil pump: Allows operation in either direction
Simplified top down design: Routine maintenance is minimally invasive
Operating Specifications
Model D891/FD891
Bore of cylinder inches (mm) 4.5 (114)
Stroke inches (mm) 4.0 (101.6)
Piston displacement cfm (m
3
/hr)
minimum @ 400 RPM 56.6 (96.2)
maximum @ 825 RPM 116.8 (198.4)
Maximum working pressure psig (bar g) 450 (31.0)
Maximum brake horsepower (kW) 45 (34)
Maximum rod load lb (kg) 7,000 (3,175.2)
Maximum outlet temperature °F (°C) 350 (177 )
Maximum flow—propane gpm (m
3
/hr) 6 9 4 (157.6)
1
These numbers specify pressure-containing abilities of the compressor cylinder and head. For many applications, factors other than the pressure rating will
limit the maximum allowable discharge pressure to lower values. These factors include horsepower, temperature and rod load.
Equipment Type and Options Applications
Double-acting, vertical, reciprocating piston type vapor compressor
Double packed rod
Slip-on weld connections or Class 300 RF flanges
Bulk transfer
Truck, tank,
railcar, barge
unloading
LTVR and
scavenger
applications
Emergency
evacuation
36
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