Pulse diaphragm valve, NC, 24 V DC internal pre-control, G 2 - Riegler 102991

Pulse diaphragm valve, NC, 24 V DC internal pre-control, Medium temperature max. 85 °C, G 2, PN 0.35 - 8.5 bar, CR diaphragm Environmental protection today demands state-of-the-art cleaning processes. Dust filter systems are an indispensable aid to pollution control. The fabric filters installed in these systems are cleaned by blowing in compressed air pulses in quick succession counter to the main direction of flow. The solenoid valves used for this purpose are characterised by the following application-specific design features: - Angle type of construction to optimise the air flow - Full cross-section at the valve seat - Extremely fast opening and closing - Quiet operation thanks to built-in silencers (can be retrofitted in sizes 1 1/2­ to 2 1/2) - Easy maintenance and repair because diaphragm and wearing parts are instantly available The valves are not suitable as shut-off devices for standard applications.

Technical data

Standards and origin

• Customs tariff number: 84818079
• Country of origin: DE

About Solenoid valves

Solenoid valves switch a media flow electrically, with no manual intervention at the line. The range covers nominal sizes from DN 1 to DN 66 and operating pressures up to 50 bar, with ports from G 1/8 to G 2. Some versions work from -1 bar upwards, which makes them suitable for vacuum duty.

What matters when choosing

• Function: normally closed (NC), normally open (NO) or any flow direction (BEL). What matters is the state the plant should assume when power is lost.
• Voltage: 12 V DC, 24 V DC, 24 V AC, 110 V AC and 230 V AC, plus 24 V AC/DC and 230 V AC/DC versions. Follow whatever the existing control system supplies.
• Sealing material NBR, FKM, FPM, EPDM, PTFE or FFKM: match the elastomer to the medium and to the media temperature, which runs between -30 and 160 °C depending on version.
• Body material: brass, aluminium, polyamide, glass-fibre reinforced polyamide, polypropylene or stainless steel 1.4301, 1.4401 and 1.4581. Stainless steel is the choice for corrosive media and demanding wash-down regimes.
• Nominal size DN 1 to 66 mm and operating pressure: upper limits run from 1 to 50 bar, and nominal size sets the achievable flow.

Typical applications

• Shutting off and releasing compressed air in machines and plant
• Cleaning fabric filters in dust collection systems using pulse diaphragm valves
• Switching duties in cooling and heating water circuits
• Dosing and filling stations handling thin, neutral media
• Vacuum applications with operating pressures from -1 bar

Threads are made to DIN EN ISO 228-1 or ISO 7-1. Protection class IP 65 or IP 67 is reached with the connector socket correctly fitted.