Description

HERBERHOLZ – PNEUMATIC BUTTERFLY VALVE 

Manufactured: Herberholz GmbH

Product Type: Pneumatic Butterfly Valve Assembly

Product Tag: AK/D-eem-02-50-10/DF78-2E

Actuator Code: DF78/90-08-V17-E

 

General Information

The Herberholz AK/D-eem-02-50-10/DF78-2E is a Smart Basic Edition DN50 pneumatic butterfly valve assembly designed for automatic flow control in industrial air systems.

The valve is designed for clamping between flanges according to DIN EN 1092-1 PN10/16. Its face-to-face length is 43 mm according to DIN EN 558-1 Series 20.

The assembly uses a single-acting pneumatic double-piston rotary actuator. Internal spring force automatically moves the valve to the closed position when pneumatic control pressure is removed.

Source: Supplied specification sheet, Item 2.

 

Materials Information

• Valve Body: EN-JS 1030 according to DIN EN 1563, epoxy coated
• Valve Disc: EN-JS 1030 according to DIN EN 1563, Rilsan coated
• Valve Shaft: Stainless steel 1.4021 according to DIN EN 10088-3
• Valve Seal: NBR, replaceable
• Leakage Rate: Rate A according to DIN EN 12266-1

 

Features

• Smart Basic Edition DN50 butterfly valve assembly.
• Designed for installation between PN10/16 flanges.
• Single-acting double-piston rotary actuator.
• Spring-force closing operation.
• Fail-close action when pneumatic pressure is removed.
• 90-degree quarter-turn movement.
• Adjustable actuator travel.
• Replaceable NBR valve seal.
• Epoxy-coated valve body.
• Rilsan-coated valve disc.
• 24 VDC solenoid control.
• 3D visual position indication.
• Electrical end-position feedback.
• IP67 signaling enclosure.

 

Actuator Specifications

• Actuator Type: Pneumatic double-piston rotary actuator
• Operating Principle: Single acting
• Fail Action: Spring-force closing
• Actuator Type in Specification: DF78
• Actuator Code on Product: DF78/90-08-V17-E
• Rotation Angle: 90°
• Air Connection: 1/4-inch NAMUR
• Adjustment Range: 90°, adjustable from −5° to +5°
• Minimum Control Pressure: 5 bar
• Maximum Control Pressure: 10 bar
• Control Medium: Filtered air according to PNEUROP/ISO Class 4
• Indicator: 3D position indicator in English

Control Valve Specifications

• Control Valve Function: 3/2-way solenoid valve
• Type: KN 05-310-HN
• Air Connection: G1/4, NAMUR
• Control Voltage: 24 VDC

Signaling Device Specifications

• Function: End-position feedback
• System: Wavecontrol
• Housing: Polyamide
• Position Indicator: 3D position indicator
• Type: EPE-2M
• Sensor Type: Honeywell V15H10 microswitch
• Maximum Voltage: 250 VAC
• Maximum Current: 0.1 A
• Switching Function: Changeover
• Contact Material: Gold-plated contacts
• Protection Class: IP67