Auxiliary Valves ENGINEERING YOUR SUCCESS.

Auxiliary Valves Subject to alteration without prior notice. The curves and diagrams in this catalogue are typical examples only. While the contents of the catalogue are updated continuously, the validity of the information given should always be confirmed. For more detailed information, please contact Parker. A WARNING - USER RESPONSIBILITY FAILURE OR IMPROPER SELECTION OR IMPROPER USE OF THE PRODUCTS DESCRIBED HEREIN OR RELATED ITEMS CAN CAUSE DEATH, PERSONAL INJURY AND PROPERTY DAMAGE. This document and other information from Parker-Hannifin Corporation, its subsidiaries and authorized distributors...

General Information Auxiliary Valves The QDS6 sequence valve is designed to open or close a hydraulic pilot signal (that comes from an external source) when it reaches a predetermined pressure level. Common applications of the valve are in pilot logic circuits and sequence- control sub-circuits. One example of use is as a means of load-moment limitation (overload protection) in the lifting func- tions of mobile cranes, in conjunction with hydraulic remote control. In such cases, the QDS6 is used to break the pilot signal between the control valve and the directional valve when the signal pressure...

Technical Data Auxiliary Valves Possible pressure setting ranges (applicable range will depend on pressure setting you specify) Switching pressure Working pressure Tank pressure Recommended flow rate All connections are available in two versions: - G1/4 (BSP pipe thread) for flat seal (type Tredo) according to - 9/16-18 UNF-2B for O-ring seal according to SAE J1926/1. At pressure differential of 100 bar and viscosity of 30 mm/s2: Hydraulic fluids Best performance is obtained using mineral-base oil of high quality and cleanness in the hydraulic system. HLP hydraulic fluids (DIN 51524), automatic-gearbox...

Auxiliary Valves QDS6 Catalogue HY17-8542/UK Dimensions D Fitted for spools B and E only T S P X 30 max 24 15 (0.59) (0.59) 30 (1.18) 25 (0.98) 50 (1.97) Fixing holes ∅ 6.5 (2x) (Ø0.26 2x) QDS-1 15 9 (0.35) (0.94) 27 9 (0.35) 39 (1.54) 32 (1.26) (1.06) 92 (3.62) 39 (1.54) A (1.18 max) Fitted for damped signal only 5 A = 15 at 4 - 45 bar A = 44 at 46 - 250 bar Parker Hannifin Mobile Controls Division Europe Borås, Sweden

Auxiliary Valves When ordering your QDS6 sequence valve, please make use of the ordering-code system as per the example given in the chart below. For certain standard valve settings, however, there are direct ordering numbers, which are given in the table below. Code Ordering number Ordering code Code Sealing P Valve sealed with sealing wire and seal Code Damping of signal X Code Spool function A P to S normally open. External drainage of pilot section. B P to S normally open. Internal drainage of pilot section. C P to S normally closed. External drainage of pilot section E P to S normally closed....

Catalogue HY17-8542/UK Auxiliary Valves Parker Hannifin Mobile Controls Division Europe Boràs, Sweden

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