Damcos KF Hydraulic Actuator – Linear Single Acting Spring-Closing

The Damcos KF/KFR are designed as hydraulic fail close actuators. When the actuator is operated by hydraulic pressure, the output spindle is lifted (and the valve is thus opened) and the spring package is compressed. When the pressure is released, the spring package will press down the spindle and close the valve. The KF/ KFR has no external moving parts during operation.The KF/KFR is designed with built-in crossover valve and is equipped with a direct visual position indicator. The KF/KFR can be operated in any kind of environment and is easily adapted to all well-known globe valves, and all models are prepared for direct built-on modular control functions. The KFR is also equipped with a unique emergency system; when the hydraulic pressure is not available, the valve can be opened and closed by means of a built-in manual hand pump. When the pressure is reestablished, the manual hand pump function is automatically disengaged at the first hydraulic opening of the actuator.

Damcos KF/KFR Hydraulic Linear Single-Acting Spring-Closing Actuator

Damcos Choice of Hydraulic Oils

Technical Data

• Working pressure:   135 bar
• Test pressure:   1,5 x working pressure
• Burst test:   min. 675 bar
• End Closing thrust:   (spring) 1500 – 16500 N
• Viscosity of hydraulic oil:   15 to 200 cSt
• Weight:   6 to 52 kg depending on type
• Oil Displacement:   0.021 to 0.428 L
• Stroke Height:  16.25 to 62.5mm

Technical Specifications

• Temperature range:   -20°C to +80°C (Other temperature ranges on request)
• Piston:   GGG40
• Housing:   GGG40
• Output spindle:   Brass, other material on request
• Indicator housing:   Brass MS 58
• Intermediate flange:   St 52-3, other material on request
• Hand pump:   Brass MS 58
• Coating   Primer: Min. 40 μm, type Hempel EE 13140
• Top coat:   Min. 25 μm alkyd, red no. 51320

Standard Features & Optionals

The KF/KFR actuator for fail close operation of globe valves and KF actuator for fail open operation of globe valves:

• Unique and simple design with built-in crossover valve
• Easy installation on intermediate flange at globe valve
• Same unit for several valve sizes
• Will operate in sea air as well as sea water
• No external moving parts during operation
• Prepared for direct built-on modular control functions or LPU
• Built-in hydraulic emergency operation for KFR
• Direct visual position indication
• Electrical on/off or continuous position indication IP 68
• Connection block with e.g. filter
• Throttle valve
• Quick connection for emergency operation with portable hand pump
• LPU mounting
• Epoxy coating
• On request spec. features as:
• Flushing valve built into the connection block
• Making it possible to flush the system without disconnection of pipes

Manufacture

The KF/KFR actuators are manufactured in accordance with the guidelines for quality system stated in the American standard ANSI/ASQC Z-1.15. After assembly each actuator is flushed to NAS 1638/10 standard and plugged. Flushing to NAS 1648/7 standard can be performed on request.

Damcos KF Linear Hydraulic Single Acting Spring Return Fail Safe Actuator

Other Links

• Damcos LPU-S Local Power Unit, Electro-Hydraulic Single Acting
• Damcos LPU-D -Local Power Unit, Electro-Hydraulic Double Acting
• Damcos LPUM-S Local Power Unit, Electro-Hydraulic Single Acting
• Damcos LPUM-D Local Power Unit, Electro-Hydraulic Double Acting
• Damcos BRC Actuator
• Damcos BRC Hydraulic Actuators – Double Acting – ​1⁄4 Turn
• Damcos BRCF Hydraulic Actuators – Single Acting Spring Return
• Damcos KC Hydraulic Actuator – Linear Double Acting
• Damcos KF Hydraulic Actuator – Linear Single Acting/Spring Closing
• Damcos KFR Hydraulic Actuator – Linear Single Acting/Spring Closing with Handpump

Damcos KF Linear Hydraulic Single Acting Spring Return Fail Safe Actuator