Enfield Technologies - Clayton Controls

2/2 Proportional Valves

PFV liquid and gas 2/2 proportional solenoid valves simplify design and construction of medical, life-science, semiconductor and other OEM equipment. Featuring a wetted path made of 300 and 400 series stainless steel and FKM, EPDM and FFKM seal options, PFV proportional solenoid valves flow not only air and water but also the most challenging media.

Proportional Valves Information

Controllers

Enfield’s proportional valve controllers with integrated bi-directional valve drivers are designed to optimize the performance of the LS and Enfinity series valves for pressure, speed, temperature, force, flow and position control applications.

Controllers Information

Cylinder Positioning Systems

The S2 servo pneumatic positioning system combines together a proportional valve, sensors and embedded control electronics to linearly position cylinders and actuators, creating an air servoactuator that can be controlled from the PLC (Programmable Logic Controller). This electro positioner allows cylinders and actuators to stop at unlimited midstroke positions, follow complex profiles or simply prevents slamming at the ends.

Cylinder Positioning Systems Information

Pressure Regulators

Enfield offers two types of pressure regulators: electronic and manual. Electronic Pressure Regulators (EPRs) take an electric (0…10V or 4…20mA) signal as a pressure setpoint from a PLC, ADC or microprocessor a provide a linear pressure output in response. Manual pressure regulators are adjusted by a knob which allows the operator to set the pressure visually based on an onboard gauge.

Pressure Regulators Information

Proportional Valve Drivers

To remove the effects of temperature and power supply variations from valve performance, it is important to use a closed-loop-current valve driver. Enfield uni-drectional and bi-directional proportional valve drivers accomplish this by delivering a controlled current across solenoid and bi-directional voice-coils.

Available in both pulse width modulated (PWM) or linear driver models, users can choose between the benefits of power consumption and energy efficiency or reduced noise and current ripple. Enfield drivers act as power amplifiers, taking a low-power analog input signals from PLCs or microprocessors (such as +/-10V, 4…20mA or 0…10V) and outputting a high-power closed loop current across the coil.

Bi-directional proportional valve drivers are ideal for voice-coils which require both positive and negative current control, while uni-directional proportional valve drivers are ideal for solenoids which only require current in a single direction.

Proportional Valve Drivers Information