Brand: Fisher

Fisher HPAT Control Valve

Name: Fisher HPAT Angle-Body Control Valve – Brochure & Quote
Brand: Fisher

Description

Overview

The Fisher HPAT control valve is a single-port, high-pressure angle-body control valve engineered from Fisher’s HP series platform for severe throttling service where an in-line 90-degree flow path simplifies piping layout in power generation, hydrocarbon production, chemical processing, and refining plants. Where the globe-bodied HPT suits straight-run piping, the HPAT’s angle configuration is specifically favored on vertical letdown and attemperator-adjacent piping runs, reducing elbow fittings and the associated erosion and pressure-drop penalties of routing high-energy fluid through additional pipe bends.

Seven Star LLC supplies the Fisher HPAT control valve to power plants, gas processing facilities, and refineries across Oman and the wider GCC, with application engineering support and lead time confirmed at quotation for critical high-pressure angle-body valves.

Operating Principle

The Fisher HPAT uses the same cage-guided, push-down-to-close plug mechanism as the wider HP series, but routes flow through a 90-degree angle body rather than a straight globe pattern, which is particularly effective at directing high-velocity, high-energy flow downward into a vertical discharge line without the turbulence penalty of a separate elbow fitting immediately downstream. The rigid cage structure keeps the plug centered and stable through the full stroke, minimizing the vibration that a high-pressure-drop, direction-changing flow path would otherwise induce.

Because angle-body applications frequently coincide with the highest-energy pressure-reducing duties in a plant, such as boiler blowdown, steam vent, or attemperator spray water control, the HPAT accepts the same interchangeable Cavitrol III, Whisper Trim III, and WhisperFlo trim technologies used across the HP series, staging the pressure drop across multiple flow paths to control noise and cavitation damage at the severe pressure drops these applications typically involve.

Engineering Design of the Fisher HPAT

Mechanically, the Fisher HPAT is available across the HP series’ NPS 2 through 14 size range in Class 900 and Class 1500 standard pressure ratings, with the angle body geometry oriented for inlet-to-outlet flow at 90 degrees, reducing the piping fittings and support steel needed compared to a globe valve plus separate elbow arrangement. This compact routing is especially valuable on retrofit projects where existing pipe rack geometry constrains the available space for new control valve stations.

Sealing at flanged connections uses the same premium spiral-wound gaskets in alloy 600/graphite or alloy X750/graphite combinations rated for the HP series’ temperature and pressure extremes, and quick-change trim construction lets maintenance teams service the hardened cage, plug, and seat components with standard tools. Micro-Flute and Micro-Form plug options extend the HPAT’s usable rangeability to low-flow startup and shutdown conditions while retaining tight shutoff at the top of the valve’s operating range.

Key Features

The Fisher HPAT control valve brings HP series severe-service performance to angle-body piping configurations for high-energy throttling duty.

Angle body geometry directs high-velocity flow through a 90-degree turn, reducing elbow fittings and associated erosion in vertical discharge piping.
Cage-guided, push-down-to-close plug design provides stable, low-noise operation under sustained high differential pressure.
Interchangeable Cavitrol III, Whisper Trim III, and WhisperFlo trims control noise and cavitation at severe pressure drops.
Standard Class 900 and Class 1500 pressure ratings across the full NPS 2 through 14 size range.
Premium spiral-wound gaskets in alloy 600/graphite or alloy X750/graphite maintain reliable sealing at temperature and pressure extremes.
Quick-change trim components require only standard tools, reducing maintenance downtime during scheduled outages.
Micro-Flute and Micro-Form plug options extend usable rangeability for low-flow startup and shutdown conditions.
Compact angle-body routing reduces piping and support steel requirements on constrained retrofit installations.

Industrial Applications

The Fisher HPAT is specified on boiler blowdown, steam vent, and attemperator spray water control in power generation plants, as well as high-pressure gas letdown and vertical discharge piping in upstream oil and gas and refining facilities where an angle-body flow path simplifies routing. Its ability to combine severe-service anti-cavitation trim with a compact 90-degree body makes it a common choice wherever plant layout favors a direction change at the control valve station rather than a straight-through globe arrangement.

Working closely with plant engineers in the region, Seven Star LLC supplies the HPAT control valve throughout Oman and the broader GCC, supporting power generation and gas processing projects in the Sohar and Salalah economic zones as well as refineries and upstream facilities around Muscat, where technical support with selection helps reduce the downtime risk on critical high-pressure angle-body isolation and throttling valves. GCC-wide power and process operators specify the HPAT on new-build vertical discharge systems and on retrofit programs where pipe rack space constrains a conventional globe valve installation.

Technical Specifications

The table below summarizes the principal Fisher HPAT specifications and control valve design data as published by the manufacturer.

Parameter	Specification
Model	Fisher HPAT
Body Style	Angle body, single port, 90-degree flow path
Size Range	NPS 2 through 14
Pressure Class	Class 900 and Class 1500 standard
Plug Action	Cage-guided, push-down-to-close
Trim Options	Cavitrol III, Whisper Trim III, WhisperFlo; Micro-Flute and Micro-Form for low flow
Gasket Material	Spiral-wound, alloy 600/graphite or alloy X750/graphite
Typical Service	Boiler blowdown, steam vent, attemperator, and high-pressure letdown
Dimensional Standards	ASME; drawing-specific dimensions per size

Request a Quote for Fisher HPAT Control Valve

Power plant and process engineers across Oman and the GCC can request a formal quotation for the Fisher HPAT control valve directly from Seven Star LLC, including current lead times, full technical datasheets, and trim selection guidance for boiler blowdown, steam vent, and attemperator applications. With fast quotation turnaround and technical support, Seven Star LLC’s instrumentation and valve automation division is available to support angle-body valve sizing, trim selection, and FIELDVUE digital valve controller integration, so contact our team today to specify a control valve engineered for your most demanding high-pressure angle-body service.

Also available: Fisher V200 Vee-Ball Segmented Ball Control Valve · Fisher CV500 Eccentric Plug Control Valve

Datasheets & Documents

Brochure Fisher HPAT Control Valve Catalog Download

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About brand

Fisher is the control valve brand of Emerson. Its history starts in 1880 in Marshalltown, Iowa, where William Fisher, working at the town waterworks, invented a constant-pressure pump governor and founded a company to make it. Emerson bought Fisher Controls in 1992, and Marshalltown remains a main engineering and manufacturing site for Fisher valves. The brand covers control valves, actuators, FIELDVUE digital valve controllers, regulators and level controllers.

Seven Star LLC is an independent supplier listing Fisher control valves, actuators, positioners, regulators and spare parts for buyers in Oman and the GCC. Replacement valves and trim are matched from the serial number on the valve nameplate.

Fisher company profile

Origin	William Fisher's constant-pressure pump governor, Marshalltown, Iowa, USA (1880)
Ownership	Owned by Monsanto from 1969; sold to Emerson in 1992 and combined with Rosemount as Fisher-Rosemount, later Emerson Process Management. Today a brand of Emerson.
Main site	Marshalltown, Iowa, USA
Product families	Sliding-stem and rotary control valves, spring-diaphragm and piston actuators, FIELDVUE digital valve controllers, pressure regulators, displacer and digital level controllers
Typical duty	Throttling control of liquids, gas and steam, high-pressure and severe service, instrument supply and gas pressure reduction

Milestones

1880: William Fisher builds a constant-pressure pump governor in Marshalltown, Iowa.
1969: Monsanto acquires Fisher Controls.
1992: Emerson buys Fisher and combines it with Rosemount as Fisher-Rosemount, later Emerson Process Management.

Fisher valves, actuators and instruments

Series	Type	Typical use
easy-e ES, ET, EZ	Sliding-stem globe and angle valves	Cage-guided globe valves: ES with unbalanced plug, ET with balanced trim for higher pressure drop; EZ unbalanced with a seat ring retainer for viscous or dirty fluids
GX	Compact globe valve with integral actuator	Standard chemical and process duty where a compact valve package is preferred
HPT, HPAT	High-pressure globe and angle valves	Pressure classes up to ASME CL2500, compressor recycle and high-pressure letdown
V150, V200, V300, V250	Vee-Ball segmented ball and full-bore ball control valves	High-capacity control of liquids, gas and fibrous or slurry service
CV500	Eccentric rotating plug valve	Erosive, coking and dirty service
8560, 8580	High-performance butterfly valves	Large-line throttling and on-off control
657, 667, 1052, 1061, easy-Drive	Spring-diaphragm, piston and electric actuators	657 and 667 for sliding-stem valves; 1052 and 1061 for rotary valves; easy-Drive where no air is available
FIELDVUE DVC6200, DVC2000, 3610J	Digital valve controllers and positioners	HART positioning with valve diagnostics; 3610J pneumatic positioner for rotary actuators
627, 1098-EGR, 67C	Pressure regulators	Gas pressure reduction, pilot-operated regulation and instrument air supply
DLC3100, 2500	Digital and pneumatic level controllers	Displacer level and interface on separators and scrubbers

Where Fisher valves are used

Fisher control valves and regulators are standard equipment in oil and gas production, refineries, gas processing and LNG, petrochemicals, power plants and water systems. Typical loops are separator level and pressure, compressor anti-surge and recycle, fuel gas pressure reduction, feedwater and steam control, and chemical dosing. FIELDVUE controllers add diagnostics that help plan valve maintenance before a turnaround.

Ordering Fisher valves and spare parts: what we need

For spares, send the serial number from the valve nameplate together with the valve type, size, pressure class, trim and actuator type and size. Emerson keeps the build record behind the serial number, so plug, seat ring, cage, packing and diaphragm kits can be matched without guesswork. For a FIELDVUE or regulator, send the full model and type number and the mounting details. For a new valve add the process data: fluid, flow range, inlet and outlet pressure, temperature, leakage class, fail position, air supply and signal.

Facts checked against Emerson Fisher product information and published company histories, October 2026.

Browse Fisher products by category: Control Valves, Valve Actuator, Valve Positioner, Regulators, Level Transmitter.

FAQ

Questions about the Fisher HPAT Control Valve

Answers from our engineering team on installation, compatibility and integration.

01How does the Fisher HPAT differ from the globe-bodied HPT?

The HPAT uses a 90-degree angle body instead of a straight globe pattern, which is favored on vertical discharge piping such as boiler blowdown and attemperator lines, reducing elbow fittings and their associated erosion.

02What trim options control noise and cavitation on the HPAT?

The HPAT accepts interchangeable Cavitrol III, Whisper Trim III, or WhisperFlo trim technologies that stage the pressure drop across multiple flow paths to control noise and cavitation damage.

03What pressure ratings and sizes are available on the HPAT?

The HPAT is available across the HP series NPS 2 through 14 size range with standard Class 900 and Class 1500 pressure ratings.

04What applications is the HPAT typically specified for?

It is commonly specified for boiler blowdown, steam vent, and attemperator spray water control in power plants, as well as high-pressure letdown in vertical discharge piping in refining and upstream oil and gas facilities.

05Is Seven Star LLC an experienced supply partner for Fisher products?

Yes, Seven Star LLC is an experienced supplier of Fisher control valves in Oman and the GCC, supplying Emerson-manufactured equipment with local technical support.