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Price: $ 680.00
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Part Number: 1166
Usually ships in: 2-3 weeks
Shipping weight: 6.00 lbs

  • Maximum Cv = 1.7
  • All 316ss construction
  • 4-20mA or 1-5 VDC input
  • 1/8 percent resolution (new)
  • Controls liquids and gases
  • Low cost
  • No stick-slip
  • Adaptive noise filter
  • Long-life rotary stem seal
  • Compact size
  • Five year warranty

Owner's Manual

Similar product(s)


The EPV-375SS Electronic Proportional Valve is a low-cost, computer-controlled proportional valve which directly accepts a 4-20 mA or 1-5V DC control signal. The EPV performs better, costs less to install and less to operate than competitive valves. It is ideal for accurate control of liquid and gas flow.

The EPV has no backlash and no hysteresis. This greatly simplifies control programs. The valve is opened and closed by a zero-backlash screw mechanism. A step motor is directly connected to the valve without gears. The valve can also be operated manually.

An adaptive digital noise filter eliminates dithering of the valve due to noisy control signals. This digital filter can be disabled via a switch on the circuit board.

The valve design features a long-life rotary stem seal. Rotary seals are more durable and require less maintenance than reciprocating stem seals used in pneumatic valves. This seal does not cause the unwanted stick-slip action of pneumatic valves.

The compact size of the EPV makes it easier to handle, and allows it to be installed in smaller spaces. The EPV is about one-third the size of a pneumatic valve.

An EPV installation costs less than a comparable pneumatic control valve system. There is no need for compressed air, filters, regulators, I-P converters, or pneumatic air lines. Simply connect the EPV to the control signal and the power supply.

The EPV is backed by a five (5) year warranty. The reliable, low-maintenance design and heavy-duty construction reduce costly downtime.

The EPV-375SS is made from Type 316 stainless steel. It has 1/2 inch pipe fittings with a 3/8 port size and a Cv of 1.7.

Try our interactive valve sizing calculator to help you select the correct valve for your application.

The old instruction manual can be found here.



Updated March 1, 2016
Type: Single-board microcontroller with 10 bit AD converter
Control: Open-loop
Inputs: 4-20 mA current or 1 - 5 VDC voltage for position. Switch selectable.
Input Impedence:
4-20mA selected: 250 Ohm
1-5 VDC selected: 32K Ohm
Signal floats, or is grounded, switch selectable and has 1M Ohm isolation from analog circuit
Outputs: None
Modes: Full range, direct acting only
Adaptive digital filter on or off via switch
Adjustment: None
Temperature: 32 F to 120 F (0 C to 49 C)
Humidity: 10 to 80% non-condensing
Enclosure: Stainless steel, general purpose
Power supply: 12-24 VDC, 1.5A (1043 Power Supply recommended)
Power: consumption 23 Watts maximum, 1 Watt typical


Type: DC step motor, 200 steps/revolution, 4 revolutions for full stroke
Resolution: 800:1 (0.125%)
Speed: 45 RPM - 5 seconds full stroke
Torque: 57.5 oz-in peak


Type: Globe, In-line
Port Size: 3/8 inch
Cv: 1.7
Flow characteristics: linear
Valve body material: Type 316 stainless steel
Valve trim material: Type 316 stainless steel
Seat seal material: 25 % glass filled TFE
O-ring material: ethylene propylene (standard - other materials available)
Pipe size: 1/2 NPT
Connection: Female pipe thread
Static Pressure: 300 psi
Differential Pressure: 0 - 120 psi
Temperature: 32 - 250 Degrees F (0 - 121 C)
Bonnet Seal: Encapsulated EPR O-ring
(Neoprene, silicone and other O-ring materials also available)
Stem Motion: Rotational


Dimensions: 8.0 x 3.5 x 2.5
H x W x D

Installation Drawing

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Hass Manufacturing Company
371 NY Highway 351, Averill Park, NY  12018  USA
Tel (518) 674-8151  Fax (518) 674-8157

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