Cylinder, Design Features
Non-water
jacketed Cylinders
Ariel cylinders are provided without
water jackets. Water
jackets were originally used to maintain the dimensions of cylinder bores
with longer piston strokes and more complicated casting geometry. Shorter
stroke cylinder designs combined with casting quality allow the use of
non-jacketed cylinders while maintaining stable bore geometry.
Below is a non-jacketed cylinder
cross-section:
Non-lined
Cylinders
All ASTM A395 ductile iron cylinder
bores are surface hardened with an ion-nitride
process to increase cylinder bore wear resistance. Ion nitride surface
hardening is provided in lieu of providing a sacrificial wear part (liner).
Should
a cylinder bore become damaged beyond the re-bore capability, a replacement
can be provided. Since Ariel cylinders are non-jacketed (simpler casting
geometry), the downtime and cost of a replacement cylinder is generally
lower than the downtime and cost of removal and re-installation of a cylinder
liner.
ASME
Section VIII Pressure Vessel Design
Ariel cast cylinders are designed
and pressure rated based on guidelines from Section VIII, Division 1,
of the ASME Pressure Vessel Code. Although compressor cylinders categorically
cannot be ASME Code stamped, Section VIIl, Division 1 of the ASME Pressure
Vessel Code provides consistent design and pressure rating methods. Please
contact Ariel Design Engineering for a description of the methods applied.
Cylinder
Re-Bore Capability
Ariel cylinders may be rebored
within limits. A
bore restoration guideline is available from Ariel upon request.
Ariel
Corporation Application Manual
28 December 2007