PRD - Pressure Reducing Vavlve Direct Acting
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PRD - Pressure Reducing Vavlve Direct Acting - 1

Industrial Products Pressure Valves Sizes 6 & 10 up to 315 bar up to 60 L/min Pressure Reducing Valve Direct Acting Type PRD, Series 10 Data Sheet R-1003/10.98 GB Features ◊ Compact construction. ◊ Drain amount minimal compared with balanced piston type, pressure reducing valve. ◊ Four pressure ratings. ◊ Three adjustment elements. Type PRD 1 2 5 3 6 B AY 7 8 4 Functional Description Type PRD6P Pressure Reducing Valve is a direct operated valve of the 3-way design, i.e. with pressure relief function on the reduced pressure side. The valve is used to reduce the pressure on a section of a circuit. Pressure setting is by means of the pressure setting element (4). At rest, the valve is normally open, and fluid can flow unhindered from port A to port B. Pressure in port B is also present on the end of the spool (2), via control line (6), opposing the compression spring (3). When the pressure in port B reaches the pressure level set at spring (3), spool (2) moves to the control position and holds the pressure in port B constant. If the pressure in port B rises still further due to external forces, the spool (7) is moved still further towards the compression spring (3). This causes a flow path to be opened over the control land (8) in the control spool (2) to tank. Sufficient fluid then flows to tank to prevent any further rise in pressure. The spring chamber is drained to tank externally via port Y. An optional non-return valve (5) is available to allow free flow from port B to A. A pressure gauge connecton (1), permits the ‘reduced’ pressure to be monitored. Fluid to control the valve is taken from port B via control drilling (6). Model PRD Page 1.5 Data Sheet R-1003/10.98

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PRD - Pressure Reducing Vavlve Direct Acting - 2

Pressure Valves Industrial Products Symbols Standard Type Model C B B M M A Y A Y Pilot oil feed internal Pilot oil feed internal Pilot oil drain external without non-return valve Pilot oil drain external with non-return valve Ordering Code – Pressure Reducing Valve, Direct Operated PRD 6 P 10 1 150 Y C V Suitable Oil Pressure Reducing Valve, Direct Operated No Code: Mineral Oil V: Phosphate Ester W: Fatty Acid Ester, Water Glycol Size 6, 10 Type of Mounting Reverse Free-Flow Check Valve P: No Code: Without Reverse Check Valve C: With Reverse Check Valve Sub-plate Mounting Series Number 10...

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PRD - Pressure Reducing Vavlve Direct Acting - 3

Industrial Products Pressure Valves Technical Data For applications outside the following parameters, please consult Kawasaki Precision Machinery (UK) Ltd. Pressure Fluid Mineral oil, phosphate ester, fatty acid ester and water glycol. Phosphate ester is only suitable for use with FPM seals. Pressure Fluid Temperature Range - 20°C to +70°C Degree of Contamination Maximum permissible degree of contamination of fluid is to NAS 1638 Class 9. Kawasaki recommend a filter with a rentention rate of ß10 ≥ 75. Viscosity Range 2.8 to 380cSt Maximum Operating Pressure Size 6 – Up to 315 bar (Port A),...

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PRD - Pressure Reducing Vavlve Direct Acting - 5

Industrial Products Pressure Valves Unit Dimensions (contimued) - Valve PRD10P 8 9 PRD10P-10-3/* 5 6 7 35.8 21.5 11.1 7.2 30 192.5 PRD10P-10-2/* 33.4 7.9 58.8 87 66.7 X A Width across flat 8 B Y 32 42.9 182.6 192.5 Ø60 6 5 4 13 30.5 7 74 8 9 PRD10P-10-1/* Ø6 4-M10 ∅D ∅d t Remarks X, Y 13 7 1.4 JIS B2401 P10 HS90 A, B 22 13 1.8 JIS B2401 P18 HS90 Port position Ød t ØD Since port X is not connected with internal of valve, O-ring is not necessary at port X KAWASAKI PRECISION MACHINERY (UK) LTD Ernesettle, Plymouth, Devon, PL5 2SA, England Tel: +44 1752 364394 Fax: +44 1752 364816 E...

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