ARES - Angle seat valve OMAL, spring return NC

The OMAL ARES is an angle seat valve with a stainless steel body, sized for higher flow rates than the ATENA. The angled seat and long face-to-face dimension give a straight flow path and reduce turbulence, keeping the pressure drop low. These versions are spring return, normally closed (NC) — the spring closes the valve when air pressure is lost.

These models are ordered with the flow from below the plug, which is bidirectional (1↔2) and prevents water hammer on closing.

Construction

• Body and sleeve A351-CF8M (AISI 316), stem and plug 316L
• Stem seals PTFE-CF, body seal graphite, plug seal PTFE
• Seal located in the cylinder instead of on the piston: longer stroke and higher flow rate, less seal wear
• Chevron (V-shape) sealing, spring pre-loaded: 5 seals below the spring, 3 above
• From DN63 upwards, metal piston with chemical nickel coating (10–15 µm, surface hardness 700–750 HV)
• Piloting head inserts in 303 S.S., rolled shaft (Ra 0.1 µm)
• Self-aligning (oscillating) plug

Technical data

• Threads EN 10226-1 Rp (ex ISO 7/1); NPT on request
• Media pressure 0–16 bar, temperature −10…+180 °C (steam at 180 °C: 0–10 bar)
• Control pressure 4–10 bar with Ø63 head, 4–8 bar with Ø90 and Ø110 heads
• Ambient temperature −10…+60 °C, max. viscosity 600 cSt
• Air consumption with Ø63 head 0.108 dm³/cycle (Ø90 and Ø110 in the catalogue)
• Mounting in any position: upright, flat or angled
• PED 2014/68/EU and ATEX certificate (ATEX configuration specified at time of order)

Sizing note

The maximum operating differential pressure (ΔP max) decreases rather than increases with size: DN40 withstands 16 bar, DN50 only 10 bar with the same Ø110 control head. Select the valve by the differential pressure to be shut off, not by pipe size. The Kv value is the flow coefficient in m³/h with water at 1 bar pressure drop.

Accessories

• Directly mounted solenoid: electro-pilot 3/2 (EP412024 = 24 VDC) or NAMUR solenoid 3/2–5/2 (ER8188C2 = 24 VDC) + NAMUR plate KBNJ0001
• IP68 limit switch cap for magnetic switches: KFJM18 (Ø63), KFJM21 (Ø90), KFJM23 (Ø110)
• Stroke limiter for flow regulation: KLJL0018 (Ø63), KLJL0021 (Ø90), KLJL0023 (Ø110)
• Emergency manual override (all NC versions): KLJA0018 (Ø63), KLJA0021 (Ø90), KLJA0023 (Ø110)
• IP65 limit switch box with two mechanical switches

Spare parts: plug kits KGJP1005/1006/1107/1108/1109 and head kits J4SPG18R5, J4SPG21R6, J4SPG21R7, J4SPG23R8, J4SPG23R9 by size.