Omega Products PV12-SS User Manual

ELECTRONICALLY CONTROLLED

AR TWORK/MECH AR T/ Pressure C - 29

PROPORTIONING VALVES

PV Series

U Programmable Direct- or

Reverse-Acting Control

U Precision Control is

Achieved via a 10-Bit Converter Controlling a 200 Stepper Revolution Motor

U Rugged Construction for

Industrial Applications

U External Safety Override

Contacts to Open/Close Valve

U NEMA 4 (IP65) Rating

for Outdoor Use

U Ideal for Liquid and Gas

Applications

An electronically controlled proportioning valve (ECV) will take an electrical input signal (usually 4 to 20 mA) and proportion the amount of flow through a pipe from fully closed to fully open. The OMEGA® ECV valve features programmable direct-acting or reverse-acting control. Direct-acting means that, as the current signal rises, the valve allows more flow, while reverse-acting will decrease the flow rate with an increasing current signal.

These units can also be programmed to sense a failure in the current loop and fully close/open the valve when the signal level drops below 3.5 mA. Dry-contact remote switches can be used in conjunction with the standard current signal to provide an alarm signal that fully closes/ opens the valve. An internal 5 Vdc signal is used to sense the state of the external switches.

The rugged epoxy-coated aluminum package ensures NEMA 4X (IP66) protection for the powerful microprocessor and servo actuator. Internally, a 10-bit A/D converter is positioning a 200 step/revolution stepper motor for precise flow.

omega.com/px750

PX750 PRESSURE

TRANSDUCER

FOR FLOW

MEASUREMENT

Available with brass or stainless steel body.

PV14-SS, shown much smaller than actual size.

WITH 4 to 20 mA PID OUTPUT

The stepper motor is directly connected to the valve stem without gearing, thereby eliminating backlash (hysteresis) effects. The valve can also be manually controlled with a screwdriver.

omega.com/cni_series

CNI853 CONTROLLER

omega.com/

fpt6100

FPT6100 PIT OT TUBE T O TRANSFER PRESSURE T O PX750

Flow

U12Y100

POWER SUPPLY

PV SERIES ELECTRONICAL Y CONTROLLED PROPOR TIONING V AL VE

L-19

WT = + 4-20 BK = - 4-20 R = + Ex R/W = - Ex ( Does not operate if 4-20 is reversed) GN to Blue = Full Open G/W to Blue = Full Close

PV series valve (with cover removed).

SPECIFICATIONS

Electronics

Power Requirements: 12 Vdc @ 3 A

Caution: Using an underrated power supply will damage the unit.

Inputs: 4 to 20 mA control signal (250 Ω impedance) and dual external switch contact sensing via 5 Vdc signal

Control Modes: Direct or reverse, full or split range, high or low range, fail condition open or closed

Adjustments: Zero offset ±0.5 mA Operating Temp: 0 to 49°C

(32 to 120°F) Enclosure: NEMA 4X (IP66),

epoxy-painted aluminum

Connections:

(16" 22 AWG pigtail leads)

To Order

⁄2 NPT conduit

Visit omega.com/pv14 for Pricing and Details

Actuator

Type: DC step motor, 200 steps/rev,

4 rev travel Resolution: 200:1 (0.5%)

(4 steps increment) Speed: 45 rpm (5 s full stroke) except

⁄4" valves: 18 rpm (12 s) full stroke

Torque: 57.5 in-oz (188 in-oz

⁄4 valve)

Valve

Type: In-line globe Temp: -18 to 120°C (0 to 250°F) Pressure: 120 psi max (70 psi on Max Flow: GPM = Cv (∆P/SG)

for gases, use standard equation found on page L-27

Wetted Parts: Ethylene propylene rubber O-ring, PTFE washer and valve body (brass models have 303 SS internal trim)

⁄4" valve)

⁄2 liquids;

COMPLETE UNIT:

Dimensions: 216 H x 185 W x 137 mm D

(8.5 x 7.3 x 5.4") 1⁄2 Valve: 229 H x 185 W x 137 mm D (9 x 7.3 x 5.4") 3⁄4 Valve: 305 H x 203 W x 191 mm D (12 x 8 x 7.5")

Weight: 3.2 kg (7 lb);

⁄2 valve: 4.5 kg

(10 lb); 3⁄4 valve: 8.2 kg (18 lb)

U12Y100 SPECIFICATIONS:

Power Supply: 120 Vac or 240 Vac

@ 50 to 60 Hz, switchable

Output: 12 Vdc unregulated @ 3 A Connections: 2.1 m (7') power cord,

3-pin DIN connector with 1.8 m (6') 3-conductor 22 AWG, pigtail leads

Dimensions: 102 W x 152 L x 76 mm H (4 x 6 x 3")

Weight: 1.4 g (3 lb)

VALVE FITTING MAX FLOW BODY MODEL NO. SIZE mm (in) SIZE CV @ 50 psi MATERIAL

PV14-B 6.35 ( PV14-SS 6.35 ( PV516-B 7.94 ( PV516-SS 7.94 ( PV38-B 9.53 ( PV38-SS 9.53 ( PV12-B 12.70 ( PV12-SS 12.70 ( PV34-B 19.05 ( PV34-SS 19.05 (

⁄

16)

⁄

16)

⁄

4) 1 NPT 6.5 45 GPM Brass

⁄

4) 1 NPT 6.5 45 GPM 316 SS

⁄

2 NPT 0.6 4 GPM Brass

⁄

2 NPT 0.6 4 GPM 316 SS

⁄

2 NPT 1.0 8 GPM Brass

⁄

2 NPT 1.0 8 GPM 316 SS

⁄

2 NPT 1.7 12 GPM Brass

⁄

2 NPT 1.7 12 GPM 316 SS

⁄

4 NPT 3.5 24 GPM Brass

⁄

4 NPT 3.5 24 GPM 316 SS

ACCESSORY DESCRIPTION

U12Y100 Unregulated power supply 12 Vdc, 3 A

Comes complete with operator’s manual.

Ordering Examples: PV14-B, 4 GPM brass proportioning valve. U12Y100, unregulated power supply.

VALVES AND REGULATORS

L-20