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SDDA ... S

SDDA ... S
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Stacking Anti-Shock Relief Valve, size 2 Direct Acting, Cross-Line Series SDDA ... S S 250 bar, 25 l/min S Direct acting, near zero-leakage poppet S Functional parts in side-mounted body S Fast response time S 5 pressure ranges S User-modifiable to hand knob or lokkable hand knob adjustment S with ISO 4401- -01 interface -02- Series SDDA ... S- units are stack -4 mounting anti-shock cross-line relief valves which relieve A to B and/or B to A. They have fast response times, seat valves with near zero-leakage, and they have the full flow rating of the size 2 range. The ∅ 3 mm location pin on the actuator face of the valve prevents incorrect mounting. Valves are shipped as standard with screw adjustment. Alternatively, they can be supplied with adjustment by hand knob, or lockable hand knob. Valve side Valve side Valve side 3. Main characteristics Designation Design Mounting method Size Weight Mounting attitude Flow direction Operating pressure range Adjustment ranges Flow rate, Q max. Fluids Fluid temperature range Ambient temperature Replaces: D- 6.60 - pressure relief slice valve direct acting seat valve stack mounting ISO 4401- -01 interface -02Model ...AS.../ ...BS...: 0,77/ Model ...ABS...:1,15 unrestricted see symbols ... 250 in P, A and B; ... 160 in T code 25 = ... 250 code 16 = ... 160 code 10 = ... 100 code 04 = ... 040 code 02 = ... 020 25 HL and HLP hydraulic oils to DIN 51 524; for other fluids, please consult BUCHER -25 ... +80 -25 ... +80

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Viscosity range Minimum fluid cleanliness level 4. Performance graphs Measured with oil viscosity 33 mm2/s (cSt) SDDA- -S- -02 -..- -4∆p- characteristic -Q Performance limit Performance limit SDDA- ..S- 4- 25: 1 turn - - SDDA- ..S- 4- 16: 1 turn - - SDDA- ..S- 4- 10: 1 turn - - SDDA- ..S- 4- 04: 1 turn - - SDDA- ..S- 4- 02: 1 turn - - - Performance limit Rate of pressure change when turning the adjusting screw: SDDA- -S- -16 -..- -4∆p- characteristic -Q Performance limit 5. Dimensions 4 A/F (5/32”) hex. skt. for pressure adjustment Valve side Adjuster style S Socket screw Adjuster style H...

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6. Schematic section showing the relevant ports Tightening torque Ma = 4 ... 6 Nm 3 2 1 A B Seal kit no. DS-212, comprising *): Itm. Qty. Qty. Description Snap ring SDDA- AS/BS- 4 SDDA- ABS- 4 - 7. Installation and servicing All installation and servicing must be carried out with care, and by qualified personnel only. At installation, be sure to mount the valve the correct way up. Do not confuse the flat surface (directional valve side) and the surface with O-ring counterbores (actuator side). When changing seals, the new seals should be thoroughly oiled or greased before fitting them to...

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info.ch@bucherhydraulics.com www.bucherhydraulics.com © 2015 by Bucher Hydraulics AG Frutigen, CH-3714 Frutigen Data is provided for the purpose of product description only, and must not be construed as warranted characteristics in the legal sense. The information does not relieve users from the duty of conducting their own evaluations and tests. Because the products are subject to continual improvement, we reserve the right to amend the product specifications contained in this catalogue.

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