V4DO6
16Pages

Catalog excerpts

VEUAN model V4D06 pilot operated Directional Control valves conform to NFPA D08, CETOP 08 standard interface. These are subplate and manifold mounted and can be used in conjunction with stack valve system. The valve mounting interface and electrical connection methods conform to international standards CETOP.ISO, DIN. The coils used in the wet pin design solenoids are available in A.C. and D.C. voltages and are continuously rated. Precise guide for all types of spools is achieved by uniquely designed eight annuli body. Spools are interchangeable and no selective assembly is necessary. Streamlined internal channels ensure minimum pressure drop at maximum flow. ♦ Extremely low pressure drop-energy saving. ♦ High functional limit up to 185 gpm(700l/min) at nominal pressure. ♦ Mounting configuration according to CETOP, ISO 4401. ♦ Nominal operating pressure 350bar (5000psi). ♦ Interchangeability of spools & bodies due to high precision manufacturing processes. ♦ Actuated by electrical / hydraulic or lever mechanism. ♦ Wide range of A.C. and D.C. coil voltages are available both with or without manual override. ♦ Wide variety of spools available. ♦ Change of solenoid coil is fast and simple without risk of oil leakage. ♦ Permissible pressure in the tank port up to 350bar (5000psi) with external drain, up to 210 bar (3000psi) with internal drain (see characteristics). ♦ Every valve is factory tested prior to despatch.

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The electrically operated 4-way valve V4D06 consists of a main body and a solenoid operated pilot valve. The energized solenoid shifts the pilot control spool, thus directing fluid to one end of the main spool, and moving it to the desired position. Fluid can then flow from port P to either port A or B whilst the alternate port (B or A) is connected to the tank line. The necessary pilot pressure can be obtained internally from the system port P or from an external pressure supply connected to portX. De-energizing the solenoid allows both the pilot control and the main spool to return to...

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Mounting Position Ambient temperature range Operating Pressure(P,A,B,X) Operating Pressure(T,Y) External pilot pressure Viscosity range Fluid temperature range Contamination level Sliding spool valve Subplate conform to NFPA D08, CETOP 08, ISO 4401. Optional (Horizontal recommended) 9bar (130psi) for spools with open center position 10 bar(145psi) for spools with closed center position. a pilot orifice dia. 1,0 mm in P-port is recommended 185gpm (700l/min) (see diagram - Pressure drop curves) Petroleum base anti-wear fluids. Such as mineral oil according to DIN 51524/25. Maximum catalogue...

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ORDERING CODE (SOLENOID & HYDRAULIC OPERATION) A = Pilot operated, 1 solenoid (V4D01) B = Pilot operated, 2 solenoids (V4D01) C = Pilot operated, 2 solenoids (V4D01) pilot valve; 2 pos. detents 01 = 2 (a,b), spring offset to pos. "b", energized to "a" 02 = 2 (a,b), Spring offset to pos. "a", energized to "b". 04 = 2 (a,b), Spool is not centered, energized to "a" or "b" (pilot valve with detents). 05 = 2 (o,b), spring centered pos. "o", energized to "b". 06 = 2 (o,a), Spring centered pos. "o", energized to "a". 09 = for controls A, B, C, O with adjust, spool stop on both sides. 0 = External...

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ORDERING CODE (LEVER OPERATION) 01 = 2 (a,b), Spring offset to pos. "b", activated to pos. "a". 02 = 2 (a,b), Spring offset to pos. "a", activated to pos. "b".

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SPOOL TYPES & PRESSURE DROP

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SPOOL TYPES & PRESSURE DROP (Contd.) L*AT| Bl iTSlM

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Spring Centering Spring Offset Spring Centering Pilot valve with Detents Spring Centering Spring Offset @ Lever operation

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FUNCTIONAL LIMITS The "fail safe" flow limits of the spool types 11 & 51 must be reduced at higher operating pressure to comply with "safety regulations" where applicable. Means: The main spool returns to "spring offset" position only by spring force (without pilot pressure).

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DETAILED SYMBOLS X-external Y-external X-external Y-external X-external Y-external 2 (a,b), Pilot Valve with detents X-external Y-external X-external Y-external X-external Y-external 1) Plug mounted according to desired internal or external PP or PD.

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