Solenoid drain valves ASTA series ESK 985-986 pilot control

DN: 1/8"–2"
PN: 0.35-16 bar
Body material: brass
Connection: threaded

Overview Model overview Those. information Download Colors DOP, CAD

Overview

Contains a built-in timer, low resistance, requires a minimum pressure drop of 0.5 bar, 360° rotating coil, high reliability, full bore, patented technology, 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 FPM (VITON) (-10 °C…160 °C), EPDM (-10 °C…140 °C)
On request: various body coatings, nickel plating, different body materials, stainless steel internal elements (ESK986 Series), manual control, stainless steel seat, filter, other connections, flange connection
On request: other supply 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 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 Ф8–10 mm), non-flammable connectors
Other versions on request

Materials

Body: brass
Plunger seal: NBR
Insulating tube: stainless steel (AISI 430FR and AISI 304) (ESK985 Series), stainless steel (AISI 430FR and AISI 304) or brass (ESK986 Series)
Plunger: stainless steel (AISI 430FR)
Springs: stainless steel (AISI 302)
Shielding coil: copper
Seat: brass
Sealing rings: NBR
Internal parts: stainless steel steel and brass
Bonnet: brass
Diaphragm/seat seal: NBR
Bonnet bolts: stainless steel

Model overview

Those. information

Medium: water, low viscosity oils, non-aggressive liquids and gases
Safety function: Normally Closed (NC) (ESK 985 Series) and Normally Open (NO) (ESK 986 Series)
Control type: pilot
Number of strokes: 2/2 (Ports/Positions)
Dimensions: G1/8" – G2"
Connection: Thread G (BSPP / ISO 228–1)
Pressure ranges: 0.35–16 bar (1/8"…1" ESK985 Series), 0.5–12 bar (11/4"…2" ESK985 Series), 0.35–12 bar (1/8"…1" ESK986 Series), 0.5–10 bar (11/4"…2" ESK986 Series)
Temperature medium: -10 °C – +100 °C
Ambient temperature: -20 °C – +70 °C
Opening time: 200ms – 1500ms
Closing time: 500ms – 2000ms
Maximum viscosity: 38cSt or mm2/s
Maximum allowable pressure: 24 bar (ESK985 Series), 18 bar (ESK986 Series)
Required minimum differential pressure: 0.35 bar (for 1/8"…1") and 0.5 bar (for 11/4"…2"), internal exhaust system (for ESK986 Series)
Valve seal: O-rings
Voltage: AC, DC
Coil reversal without dismantling the valve (independent of AC, DC)
High flow capacity, high reliability and durability
Various flow ranges, wide range of openings
Installation in any position, but the best position is with the coil facing up
The medium must be filtered before the valve
The flow rate (Q) can be calculated based on 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)