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GAS OPERATED ACTUATORS ProControl SGS & SGD series actuators are similar to the SPS & SPD range. Many components are interchangeable, such as the centre housing, yokes, guide block and spring cans, the only major difference is the high pressure cylinder. The pipelines gas, which can be either sweet or sour gas, is used as power operating medium.
KEY FEATURES
Fabricated
entirely from carbon steel.
Totally
enclosed weatherproof housing.
Scotch
yoke mechanism to suit valve torque requirements.
Relief
vent to expel undesired overpressure.
High
pressure pneumatic cylinder in standard carbon steel for sweet or
inert gas application or special application with material according
to NACE requirements for sour gas supply medium.
Carbon
steel piston with dynamic floating O-ring seals coupled with lubricating
piston guide rings.
Carbon
steel spring cartridge (only for single acting) with safety facility which
allows safe installation and removal of the whole cartridge assembly.
AISI
316SS mechanical position indicator (fully sealed IP68 to avoid
ingress into the scotch yoke area) complete with VDI/VDE 3845
NAMUR drive slot for monitoring devices.
Bronze
sliding blocks which ensure minimum friction, allowing for a long service
life and reducing maintenance costs.
Bronze
thrust bearings and high strength alloy steel chromium plated thrust
reaction bar which guides the scotch yoke throughout its stroke and
supports all transverse loads generated.
ASTM
A 320 L7 alloy steel tie rods, with standard electrolytic zinc coating
according to ASTM B633 FeZn 12 (thickness 12 μm).
Alloy
steel end travel stops allow for accurate angular stroke adjustment.
Integral
manual override facilities.
TECHNICAL SPECIFICATIONS
Supply
pressure up to 12 bar design.
Actuator
torque output up to 1.000.000 Nm for single acting and up
to 2.000.000 Nm for double acting.
Spring
starting torque up to 400.000 Nm.
Spring
ending torque up to 250.000 Nm.
Standard
operating temperature range -30°C / +100°C.
Special
low temperature application up to -60°C.
Special
high temperature application up to +200°C.
All
ProControl pressure containing parts are designed according to ASME VIII
div.1 and EN 13445.
All
ProControl actuators are designed for 30 years’ service life.