General-purpose solenoid valves ASTA ESK 120-121 series direct acting

DN: 3/8“– 1“
PN: 1.0 MPa (ESK 120), 1.5 MPa (ESK 121)
t max°: 160°С
Body material: brass
Connection: thread (internal), G (BSPP/ ISO 228–1)

Overview Model overview Those. information Download Colors DOP, CAD

Overview

Low loss, no pressure drop required, 360° rotating coil, high reliability, light weight, patented technology, fast opening and closing, long service life.

Options

User parameters can be customized
Optional: NPT (ANSI 1.20.3), R (BSPT/ISO 7–1), W(BSW), M (metric), etc.
Optional; FPM (VITON) diaphragm or valve seal (-10 °C to 160 °C), EPDM (-10 °C to 140 °C)
Optional: various body materials, nickel plating, various
body materials, stainless steel internal parts (for ESC
121), stainless steel seat, filter, other connections, 2 or 4 mounting holes in the lower part of the body
Optional; other control voltage, frequency (60 Hz), other voltage, coil insulation class: F (155 °C), coil locking model
On request: with electronic timer, coil explosion protection for use in zones 1/21–2/22 (Eex em II T4/T5), coil insulation material – can be reinforced (V0 or V1)
On request; terminal with or without LED terminal, terminal with visual indicator and peak voltage, connector with 2 m cable, flat terminals (cable ∅8–10 mm), non-flammable connectors
Other designs on request

Materials

Body: Brass
Plunger seal: NBR
Insulating tube: stainless steel (AISI 430FR and AISI 304) for Series ESK 120, ... steel (AISI 430FR and AISI 304) and brass for Series ESK 121
Plunger: Stainless steel (AISI 430FR)
Springs: Stainless steel (AISI 302)
Shielding coil: Copper
Seat: Brass
Sealing rings: NBR
Bonnet bolts: Stainless steel and brass

Model overview

Those. information

Medium: water, light oil products and other non-aggressive liquids and air, neutral and other gases, not installed on aggressive liquids and gases
Safety function Normally closed (NC) (ESK 120 Series) and Normally open (N/O) (ESK 121 Series)
Control type: Direct acting valves
Number of strokes: 2/2 (Ports / Positions)
Sizes: G3/8" and G1/2"
Connection type: Thread (internal), G (BSPP/ ISO 228–1)
Pressure range: 0–7 bar (ESK 120 Series), 0–10 bar (ESK 121 Series)
Media temperature: -10 °C ... +80 °C
Ambient temperature: -20 °C ... +70 °C
Opening time: 25 ms
Closing time: 25 ms
Maximum viscosity: 38 cSt or mm2/s
Maximum pressure: 10 bar (ESK 120 Series), 15 bar (ESK 121 Series)
Does not require a pressure drop, internal exhaust system (ESK 121 Series)
Valve sealing: O-rings
Voltage: AC, DC
Coil changeover without dismantling the valve (irrespective of AC or DC)
High flow, low energy consumption
Various flow ranges, wide range of openings
Can be installed in any position, but best with the coil facing upwards
The medium before the valve must be filtered
According to 97/23/EC
Pressure Equipment Directive (PED), 2006/95/EEC
Low Voltage Directive (LVD) and 2004/108/EC
EMC Directive
Flow rate (Q) can be calculated given pressure, density and flow coefficient