Sizing Software Sophisticated KKI systems and expertise ensure every valve fits your requirements precisely > Product Enquiry Request information, specifications, advice and prices for all KKI products >

Roll Over Images To Expand

KOSO KENT INTROL
ACTUATORS

ACTUATORS

Versatile, Reliable Actuators for Every
Valve Application

The Koso Kent Introl range of pneumatic actuators have been developed to meet the needs of all control valve applications. All KKI actuators offer proven design (40 years) and high reliability. They are used extensively for on-shore, offshore and power installations.

Why Choose KKI Actuators?

Exceptional performance:

  • High power.
  • Fast response.
  • Low hysteresis.

Quality manufacturing:

  • High-quality materials with full traceability throughout manufacture.
  • Manufactured in a BS/EN 9001 quality-assured environment.
  • Comprehensively tested to ensure specified performance on site.

Design flexibility:

  • Reversible fail action in the field with no need for extra parts.
  • Split coupling for simple attachment to plug stem.
  • Compatible with a wide range of valve sizes and accessories.

Heavy-duty parts:

  • Robust steel construction, designed to work in corrosive atmospheres - no copper or copper bearing alloy options.
  • Low stressed components, enabling boosters to be fitted for shortened stroking times.
  • Long-life alloy steel actuator springs.

Options

  • Top and side mounted hand-wheels.
  • Maximum and minimum limit stops.
  • Special paint finishes.
  • Low temperature -46˚C option.

Our range of robust, versatile and reliable actuators includes the Series G, Series C and Series D models.

  • Series G Pneumatically Operated
    Spring-Opposed Diaphragm Actuators     Open

    Our highly successful Series G actuators use an involute rolling diaphragm that permits long travels without the need for the expensive hardware normally associated with rolling diaphragms. The modular design allows various optional extras to be retrofitted without modifying the basic unit.

    For standard applications, the Series G diaphragm actuator offers the following benefits:

    • Simple cost-effective design.
    • Long life and reliability.
    • Low cost, simple maintenance.
    • High-performance, low-friction rolling diaphragm delivers hysteresis comparable with piston types.

    Specifications

    • Sizes: 75, 150 and 300
    • Travels: ¾” to 12” (19mm to 300mm)
    • Minimum working temperature: 90°C as standard, minus 50°C special
  • Series C Spring-Return Pneumatically
    Operated Piston Actuators     Open

    Used for both positive throttling and on/off applications on automatic control valves, Series C actuators comprise a single-spring power unit that gives distributed loadings for smooth operation. The piston is fitted with seals and operates in a ‘honed’ steel cylinder, delivering smooth travel and minimising hysteresis and wear.

    Designed without linkages and with minimal working parts, this actuator offers built-in reliability and low maintenance costs. Series C actuators are always operated through a valve positioner, with two types available to suit different applications.

    The frequency response of this piston actuator is extremely high, and is superior to comparable diaphragm units. Its linear response to a signal change is unaffected by increasing or decreasing pressure, with sensitivity being maintained over the working range.

    Specifications

    • Sizes: 300 sq.in.
    • Travels: ¾” to 12” (19mm to 300mm)
    • Minimum working temperature: 90°C as standard, minus 50°C special
  • Series D Double-Acting Pneumatically
    Operated Piston Actuators     Open

    Series D actuators are created by removing the spring return feature from a Series C actuator and inserting a seal plate. This provides a double-acting piston. Extra power may be obtained for the air fail action by releasing a stored volume of air contained in a separate tank.

    Ancillary equipment comprising a three-way switching valve, lock-up valve and a check valve is required, in addition to the volume tank and pipework. The existing positioner must be set for double-action operation.

    Specifications

    • Sizes: 300 sq.in.
    • Travels: ¾” to 12” (19mm to 300mm)
    • Minimum working temperature: 90°C as standard, minus 50°C special

Find Out More

If you’d like more information about any of our actuators and instruments or have a specific requirement that you’d like to discuss, please contact us today.

Download our brochures