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Valve HAWE EM11DG24

2/2-way directional seated valves type EM for oil hydraulic systems, leakage free in blocked state, available as on/off, soft-shift or proportional valve

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Availability : Preorder, usually dispatched in 3 weeks


106,60 €

These 2/2-way directional cone seated valves show zero leakage while in blocked shifting position. The following versions are available: Basic version ' Directly actuated, two sizes for up to 3 lpm (type EM..D.. and EM..DS..). Application, as piloting or discharge valves for hydraulic consumers, e.g. idle circulation circuit for 2/2-way cartridge valves, 3-way flow control valves or piloted pressure limiting valves. ' Piloted, four sizes for up to 160 lpm. Basic flow pattern symbol ' Blocked in idle position, opening when energized (NO-characteristic) ' Open in idle position, blocking when energized (NC-characteristic). Switching characteristics ' On/Off, version with defined flow direction (type EM 11 ... EM 41) as well as for arbitrary flow direction (type EM 12 ... EM 42) ' Soft-shift, hydraulically dampened shifting "hydraulic ramp" (type EMP.. VG.. and EMP.. SG..) ' Proportional, prop. throttle (type EMP.. V.. and EMP.. S..) The actuation solenoid is a wet armature type, i.e. all moving parts of the valve and the solenoid are lubricated by the hydraulic fluid, the coil cavity is sealed to the outside at the armature tube by means of O-rings. Therefore the solenoid is highly protected against ambient influences e.g. corrosion. The valves are bled automatically during operation. A tapered pin directly opens or closes the valvular passage with the directly actuated type. Whereas a tapered pin opens (NC) or closes (NO) the piloting duct of a stepped piston with the piloted type. Thereby creating an opening (lifting off from the valve seat) or closing force at the opposing cross section and annular areas which open or close the main valvular passage. The solenoid acts either on the tapered pin (directly actuated valves) or on the tapered piloting pin (piloted valves) thereby pulling with NC-valves or pushing with NO-valves and always acting against the spring return. The valve is designed to be self-locking i.e. it is vibration save. There are various passage cross sections available with type EMP.. to enable a customized shifting characteristic, see curves in sect 2.2.1 . The operation of these valves takes a suited prop. amplifier e.g. type EV 1 M 2 acc. to D 7831/1 or type EV 1 G 1 acc. to D 7838. These valves are to be screwed into simply shaped tapped holes of a manifold which may be machined with a usual standard steel drill (point angle 118°) thereby automatically forming a stepped shoulder when the core diameter is drilled. The sealing of the inlet to outlet takes place at the contact area between the facial sealing edge of the screwed-in end of the valve body and the stepped shoulder of the core diameter at the location thread. Various connection blocks are available which may feature also additional functions e.g. drain valves, throttles etc.
Nomenclature and design 2/2-way solenoid actuated seated valve (cone seated design) Installed position Arbitrary Operation pressure pmax = 450 bar; With type EM..V: pmin = 2 bar Perm. flow Depending on type. Pressure fluid Hydraulic fluid (DIN 51524 table 1 to 3); ISO VG 10 to 68 acc. to (DIN 51519) Viscosity range: min. 4; max. 1500 mm2/s; optimal operation range: 10...300 mm2/s. Also suitable are biodegradable pressure fluids of the type HEPG (Polyalkylenglycol) and HEES (synth. Ester) at operation temperatures up to +70°C. HETG (seed oil) is not suited Temperatures Ambient: -40...+80°C Fluid: -25...+80°C, pay attention to the viscosity range! Start temperature down to -40°C are allowable (Pay attention to the viscosity range during start-up!), as long as the operation temperature during consequent running is at least 20K (Kelvin) higher. Biodegradable pressure fluids: Pay attention to manufacturer's information. With regard to the compatibility with sealing materials do not exceed +70°C.

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