2-1/2" Explosion Proof Butterfly Valve, Wafer, NBR, 110 VAC, EPS Positioner

Description

Valworx 587903 explosion proof soft seated butterfly valve is used in environments where flammable gases may be present. Wafer style valve sandwich mounts between customer supplied standard ANSI/ASME Class 125/ 150 or other international standard flanges. The EPS- Electronic Positioning System provides an accurate valve positioning function whereby the movement of the actuator is controlled by a 4-20mA input control signal. Any change in the control input signal results in a corresponding and proportional change in the position of the disc. The internal microprocessor and closed loop feedback system continuously monitors and maintains accurate valve position. The valve will remain in the last known position with loss of electric power. EPS positioning module is self-calibrating and fully potted to help protect the electronics against vibration and moisture. Valve position can be monitored with the onboard analog output signal.

The valve is direct mounted to the actuator using the international standard ISO5211 mounting pad. Rugged unique integral motor/housing design provides higher torque in a very small package. Special wave line seat and disc shape, reduces the required torque and extends the life of the valve. Precision machined 316SS disc with two-piece stem (shaft) construction, enhances the flow capacity of the valve and reduces turbulence. The stem utilizes PTFE/graphite bearings with V-ring seals preventing leakage.

Explosion proof actuator certified for UL Class I Div I as well as ATEX specifications.

Butterfly Valve Standard Features

Rugged ductile iron body with epoxy coating

Precision machined 316 Stainless Steel disc

Unique wave line seat design reduces the torque and extends the seal life

PTFE/graphite stem bearings with V-ring seals

Two piece stem/disc construction enhances flow and reduces turbulence

Standard ISO5211 actuator to valve direct mounting

Leak proof flange seals included as part of valve seat

Electric Actuator Standard Features

Explosion proof rated for UL Class I Div I Groups C & D, Ex db IIC T5 Gb Class 1 Zone 1, AEx db IIC T5 Gb

EPS-Positioner controlled by a 4-20mA input

Rugged Type 4X weatherproof aluminum alloy housing

Visual valve position indicator

Manual override

Heavy duty motor with overload protection

Analog output signal to confirm valve position

Self-locking all metal gear drive, no additional brake required

CSA Listed per UL429 and CSA C22.2, CE mark as well as ExP ratings listed above

Specifications

More Information
Actuator Temperature Range	-13 to +131 °F (-25 to +55 °C)
Anti-Condensation Heater	4 watts thermostatically controlled
Approvals	UL Class I Div I Groups C & D, Ex db IIC T5 Gb Class 1 Zone 1, AEx db IIC T5 Gb
Current Rating	0.27A (full load amps)
Cycle Time	20 seconds per 90° rotation (no load)
Disc	316 Stainless Steel
Disc Seat/Liner	NBR (Buna-N)
Duty Cycle	70%
Electrical Connections	Two 1/2" NPT threaded ports. Requires Exp rated connector or pipe (not included).
Enclosure	Aluminum alloy, polyester painted, SS fasteners
Enclosure Rating	Type 4X (IP67) weatherproof
Flow Factor	Cv 124 (Cv = number of GPM of 60 °F water at 1 psi pressure drop)
Manual Override	5mm hex drive with protective cover
Motor Protection	Thermal overload
Pipe Size	2-1/2 inch (DN50)
Pressure Rating	232 PSI (16 Bar), 29 inHg vacuum
Shaft Seals	NBR (Buna-N) V-ring
Suitable Flanges	Mounts between ANSI /ASME B16.5 Class 150, B16.1 Class 121, EN1092 PN10, PN16, BS10 D, E, JIS B2239 10K, 16K
Type	2-way with EPS Positioner Wafer Mount Explosion Proof
Valve Body	Ductile iron, epoxy coating (seat facing acts as flange gasket)
Valve Position Confirmation	2 x SPDT auxiliary limit switches 3A @ 121/210VAC, 30VDC resistive load
Valve Temperature Range	0 to 248 °F (-30 to +120 °C)
Voltage	110 VAC 50/60 Hz