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Instruction Manual

D101634X012

HP and HPA Valves

October 2014

damage, provide a relief valve for over-pressure protection as required by government or accepted industry codes and

good engineering practices.

Check with your process or safety engineer for any additional measures that must be taken to protect against process

media.

If installing into an existing application, also refer to the WARNING at the beginning of the Maintenance section in this

instruction manual.

WARNING

Some bonnet flanges have a tapped hole that was used to handle the bonnet during manufacture. Do not use this tapped

hole to lift the valve assembly or personal injury may result.

WARNING

When ordered, the valve configuration and construction materials were selected to meet particular pressure, temperature,

pressure drop, and controlled fluid conditions indicated when the valve was ordered. Since some body/trim material

combinations are limited in their pressure drop and temperature ranges, do not apply any other conditions to the valve

without first contacting your Emerson Process Management sales office.

1. Before installing the valve, inspect it to ensure that the valve body cavity is free of foreign material.

2. Clean out all pipelines to remove scale, welding slag, and other foreign materials before installing the valve.

Note

If the valve body being installed has small internal flow passages, such as with Whisper Trim III, WhisperFlo, or Cavitrol III cages,

consideration should be given to installing an upstream strainer to prevent the lodging of particles in these passages. This is

especially important if the pipeline cannot be thoroughly cleaned or if the flowing medium is not clean.

3. Flow through the valve must be in the direction indicated by the flow arrow, which is stamped on or attached to the

valve body.

Table 3. Shutoff Classifications per ANSI/FCI 70-2 and IEC 60534-4

VALVE DESIGN PORT DIAMETER, mm (INCHES) LEAKAGE CLASS

HPD, HPAD

47.6 (1.875) and smaller II

58.7 (2.3125) to 92.1 (3.625)

II - Standard

III - Optional

111.1 (4.375) and larger

III - Standard

IV - Optional

HPS, HPAS w/ Cavitrol III, or

HPT, HPAT w/ Cavitrol III, or HPAS w/Micro-Flat

All V

HPS, HPAS, HPT, HPAT, HPS, HPAS w/ Micro-Form,

or HPS, HPAS w/ Micro-Flute

All

IV-Standard

V-Optional

HPT w/ PEEK anti-extrusion rings 47.6 (1.875) to 136.5 (5.375) V - Standard

1 2 3 4 5 6 7 8 9 ... 55 56

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