Parker U Series User Manual (English)

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Maintenance

Instructions

MI-104 Revision -

Parker Hannifin Corporation

Instrumentation Valve Division

Jacksonville, Alabama

U Series Needle Valve

Table I: Maximum Working Pressure and Temperature

Valve Packing Maximum Pressure and Temperaure Maximum Temperature and Pressure

Grafoil ® 6000 psig at 70 °F 1545 psig at 1200 °F

41.4 MPa at 21 °C 10.7 MPa at 649 °C

PTFE 6000 psig at 70 °F 4280 psig at 450 °F

41.4 MPa at 21 °C 29.5 MPa at 204 °C

Always consult your authorized Parker representative if questions arise. The arrow on the Valve Body indicates the

normal direction of flow.

Table II: Packing Nut

Hex Wrench Sizes and Tightening Requirements

Valve Size Hex Wrench Size PTFE Stem Packing Grafoil ® Stem Packing

U6 3/4 inch 125 in-lbs 10.4 ft-lbs

(14.1 N-m) (37.3 N-m)

U12 15/16 inch 150 in-lbs 33.3 ft-lbs

(16.8 N-m) (44.8 N-m)

U16 1-1/8 inch 50 ft-lbs 50 ft-lbs

(67.8 N-m) (67.8 N-m)

Brand

Model

U Series

Parker U Series User Manual