 SPECIFICATIONS:
Below
is a list of the basic cylinder specifications
and terminology used, made with reference to
the drawing on the right.
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1. CYLINDER TUBE
ASTM A513 Grade 1026 and DIN 2393 ST52-3
BK with a finish of 0.4UM Ra Max. Other
material and finishes are available.
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2.
PISTON ROD
High quality chrome of a thickness to meet
or exceed Class 9 (ISO 4540) after exposure
for a minimum of 40 hrs (salt spray test
ISO3768). Induction hardened steel or stainless
steel to BS 970 Part 1 421S29 or 316S31
and Chrome with Nickel underlay are offered
as options.
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 3.
NECK GLAND
High quality cast iron to BS1452: 1990 Grade
250 or Phosphor Bronze to BS140 PB1, PB2
and BS970 Part 1: 080A42 with PTFE insets.
The glands are designed to be fully lubricated
to ensure long service life.
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4.
PISTON
One piece steel design of robust construction.
For heavy-duty applications an additional
bearing ring may be added.
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5.
OIL INLET
BSP female connections are standard but we
offer male BSP, JIC and Metric alternatives.
Also offered are elbows and pipes to manifold
blocks.
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6.
SEALS
We take great care to match the seal material
and design to the customer’s requirements
and take into account the maximum surface
speed, the life expectation and the environment
in which the cylinder operates. The selection
of the correct seal is vital to the successful
operation of our cylinders.
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7.
MOUNTINGS
A wide range from simple pins, to specialist
self-aligning bearings, to trunnion and
flange mountings to suit individual needs.
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8.
WORKING PRESSURE
Our standard working pressure range is up
to 206 Bar (3000 PSI). Please consult our
technical department if you need to operate
at higher pressures of up to 700 Bar (10,000
PSI).
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 9.
TESTING
All cylinders are subjected to a static pressure
test 50% above the maximum working pressure.
They are stamped with a serial number.
Full traceability is ensured through our
recorded test/inspection sheets.
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10.
FINISH
Cylinders are sprayed with a black oxide
primer ready for your topcoat. Other finishes
are available on request.
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OPTIONAL FEATURES
VALVES
Pilot operated check valves and hose burst
valves can be built into the cylinders
for safety critical applications. Over-centre
and check valves can also be fitted into
external manifold blocks.
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CUSHIONING
Simple or fully adjustable cushioning can
be provided at one or both ends of the
cylinder stroke. A check valve can be incorporated
into the cylinder design to allow unrestricted
starting on the return stroke. Cushioning
features will affect cylinder length depending
on the rate of deceleration required. Contact
our technical department for details.
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BLEED SCREWS
These can be provided and their location
relative to the inlet connections should
form part of the specification.
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Hydraulic Cylinders Gallery |
