Stainless steel solenoid valves ASTA ESK 620-621 series direct acting

DN: 6-50
PN: 1.6 MPa
t max°: 160°С
Body material: stainless steel
Connection: threaded

Overview Model overview Those. information Download Colors DOP, CAD

Overview

Low resistance, no pressure drop required, 360° rotating coil, various orifice options, corrosion resistance, patented technology, quick closing and opening, long service life.

Options

Custom parameters can be made to order
On request: NPT (ANSi 1.20.3), R (BSPT/ISO 7–1), W (BSP), M (metric)
On request: diaphragm, seat and stem seal can be made of FTM (VITON) (-10 °C…160 °C), EPDM (-10 °C…140 °C), NBR-H (-10 °C…100 °C)
On request: various body coatings, other connections, with two or four mounting holes in the bottom of the valve
On request: other voltage, frequency 60 Hz, coil insulation class F (155 °C), coil fixation
On request: with electronic timer, coil explosion protection for operation in zones 1/21–2/22 (Eex em II T4/T5), coil insulation material – can be reinforced with fiberglass (V0 or V1)
On request: terminal with LED, or without terminal, terminal with visual indicator and peak voltage, connector with 2 m cable, flat terminals (cable ∅8–10 mm), non-flammable connectors
Other versions on request

Materials

Body: stainless steel
Plunger seal: PTFE
Insulating tube: stainless steel (AISI 430FR and AISI 304)
Plunger: stainless steel (AISI 430FR)
Springs: stainless steel (AISI 302)
Shielding coil: copper
Seat: stainless steel
Sealing rings: NBR
Internal parts: stainless steel

Model overview

Those. information

Medium: water, low viscosity oils, slightly aggressive liquids, air, gases
Safety function: Normally Closed (NC) (ESK 620 Series) and Normally Open (NO) (ESK 621 Series)
Control type: direct acting
Number of strokes: 2/2 (Ports/Positions)
Dimensions: G3/8" – G1/2"
Connection: Thread G (BSPP / ISO 228–1)
Pressure ranges: 0–7 bar (ESK 620), 0–10 bar (ESK 621)
Media temperature: -10 °C … +160 °C
Ambient temperature: -20 °C – +70 °C
Opening time: 25ms
Closing time: 25ms
Maximum viscosity: 38cSt or mm2/s
Maximum permissible pressure: 10 bar (ESK 620), 15 bar (ESK 621)
No minimum differential pressure required, internal exhaust system (for ESK 621)
Valve seal: O-rings
Voltage: AC, DC
Rearrangement of the coil without dismantling the valve (independently of AC, DC)
Low pressure loss, low power consumption
Installation in any position, but optimally with the coil facing upwards
The medium must be filtered before the valve
Flow rate (Q) can be calculated from the pressure, density and flow coefficient
In accordance with 97/23/EC Pressure Equipment Directive (PED), 2006/95/EEC Low Voltage Directive (LVD), 2004/108/EC Electromagnetic Compatibility Directive (EMC)