Fisher® HPNS Control Valve0 pages

Instruction Manual

HPNS Valve

D103466X012

July 2014

Fisherr HPNS Control Valve
Contents

Figure 1. HPNS Valve with 667NS2 Actuator

Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
Scope of Manual . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
Educational Services . . . . . . . . . . . . . . . . . . . . . . . . . 2
Principle of Operation . . . . . . . . . . . . . . . . . . . . . . . . . 4
Lifting Guidelines . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Bonnet Nut Torquing Considerations . . . . . . . . . . . 8
Packing Lubrication . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Packing Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . 9
Replacing Conventional Packing . . . . . . . . . . . . 9
Replacing HIGH-SEAL Packing . . . . . . . . . . . . . 14
Trim Removal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Standard Balanced and Unbalanced
Trim Removal . . . . . . . . . . . . . . . . . . . . . . . . 16
Bore Seal Trim Removal . . . . . . . . . . . . . . . . . . 16
Trim Replacement . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Installing Bore Seal Trim . . . . . . . . . . . . . . . . . . . . . 20
Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
Parts Ordering . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
Parts List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28

Introduction
Scope of Manual
This instruction manual includes installation, maintenance, and parts information for NPS 1/2 through NPS 8 HPNS
valves with CL900 through CL2075 ratings. Note: Applications requiring lower pressure class ratings may use the same
casting as a higher rated valve of the required size. Refer to separate manuals for instructions covering the actuator,
positioner, and accessories.
Do not install, operate, or maintain HPNS valves without being fully trained and qualified in valve, actuator, and
accessory installation, operation, and maintenance. To avoid personal injury or property damage, it is important to
carefully read, understand, and follow all the contents of this manual, including all safety cautions and warnings. If you
have any questions about these instructions, contact your Emerson Process Management sales office before
proceeding.

Description
HPNS valves (figure 1) have buttweld end connections in various schedules and are designed for use with Fisher
667NS2 and 657NS2 actuators. HPNS valves are designed to handle high seismic environments.

Specifications
Specifications for the HPNS valves are shown in table 1.

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