Mechanical Characteristics

Standard Materials of Construction• Body–Stainless Steel• Seals–NBR, Fluorocarbon (FKM)• Sleeve Tube–Stainless Steel• Plunger–Stainless Steel• Stop–Stainless Steel• Springs–Stainless Steel• Orifice–Stainless SteelCompatible Media• All gases compatible with valve materials. For more detail consult the Fluid CompatibilityChart in our Technical Reference Manual#CTRM12-90.

Electrical Characteristics

Voltages• 12-24 VDC compatibilityPower Consumption• 7 watts maximumMiscellaneous

Temperature• Ambient–14°F to 122°F (-10°C to 50°C)• Media–0°F to 180°F (-18°C to 82°C)Hysteresis• 10% of full flow (in open loop applications)

Repeatability of a Valve• 5% when operating within Linear Control RangeResponse TimeFor complete cycle, Off-Full Open-Off• 40 msec at zero pressure• 100 msec at max. pressureCoil Type• Class AEnclosure• General Purpose, NEMA 1

SPECIFICATIONSSKINNER BP Proportional Series Two-Way

Valves

Operating Principle

The Skinner BP valve is an analog propor-tional device. The current supplied to the coilof the BP valve is digitally modulated by theelectronic package. The mechanism whichopens and closes the valve’s flow orificemoves in a linear manner in response to thev a rying coil current. The amount that theorifice is opened is a function of the user’sinput signal to the valve.Traditional proportional control solenoidvalves are operated by pulse width modula-tion which entails proportionally controllingflow by modulating the “open time” in a fullyclosed- fully open- fully closed cycle. TheBP does not operate in this manner.

Benefits of analog control technologyused in the BP valve include longer valvelife, linear flow control, no pressure or flowspikes, faster response time, simplifiedcontrol systems and less powerconsumption.Control Systems

Proportional solenoid valves, whether analogcontrolled or pulse width modulated, can beused in open or closed-loop controlsystems. In open-loop control, the inputsignal to the valve is not coupled tofeedback from the system. In closed-loopcontrol, sensors provide system information(pressure, flow, temperature) to thecontroller, which then adjusts the inputsignal to the valve until the desiredcondition is reached.

BP Valves in

Open-Loop Systems

Non-critical applications can be controlledin an open-loop fashion. Under steady stateconditions an input signal to the valve willopen the orifice and produce a certainamount of flow. However, when systemconditions change, such as pressure, theoutput of the valve will also change.BP Valves in

Closed-Loop Systems

For applications requiring more precisecontrol, closed-loop control systems arerecommended. In such systems, measure-ments of process parameters (provided bypressure, temperature and/or flow sensors)are compared to a desired set-point by acontroller. If a discrepancy exists, thecontroller will change the input signal to the BP valve until the desired setpoint is achieved.

9 6

9 7

Note: Custom configurations and calibrations are available to suit your exact flow requirements. Forinformation consult the factory.

# 6 6

Two-Way

ValvesBP Proportional SeriesBP VALVES–NORMALLY CLOSED

Pipe Orifice Maximum Flow Ranges Catalog Number

Size Size Operating At Maximum 10 PSI Control Input Signal

(NPT) (inches) Pressure Operating Pressure Example Const.

Cv (PSI) (SCCM) (SCCM) 0-2V 0-5V 0-10V 4-20mA Ref.

1/8” 1/64 Consult Factory1/8” 1/32 0.02 200 0-50,000 0-8,000 BP2EV0001 BP2EV0012 BP2EV0013 BP2EV0029 661/8” 3/64 0.045 100 0-65,000 0-17,000 BP2EV0002 BP2EV0010 BP2EV0011 BP2EV0024 661/8” 1/16 0.08 60 0-75,000 0-30,000 BP2EV0003 BP2EV0005 BP2EV0009 BP2EV0020 661/8” 5/64 0.12 40 0-80,000 0-45,000 BP2EV0004 BP2EV0006 BP2EV0008 BP2EV0014 661/8” 3/32 Consult Factory