Emerson Fisher 299HR - User Manual

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299H Series Pressure Reducing Regulators

! WARNING

Failure to follow these instructions or

to properly install and maintain this

equipment could result in an explosion

and/or fire causing property damage and

personal injury or death.

Fisher™ regulators must be installed,

operated and maintained in accordance

with federal, state and local codes, rules

and regulations and Emerson Process

Management Regulator Technologies, Inc.

(Emerson) instructions.

If the regulator vents gas or a leak

develops in the system, service to the unit

may be required. Failure to correct trouble

could result in a hazardous condition.

Call a gas service person to service the

unit. Only a qualified person must install

or service the regulator.

Introduction

Scope of the Manual

This Instruction Manual provides installation,

adjustment and maintenance instructions and parts

ordering information for the 299H Series regulators.

Instructions and parts list for the 67C Series

Instrument Supply Regulators are found in Instruction

Manual D102601X012. Instructions and parts list

for the P590 Series Filters are found in Instruction

Manual D101555X012. Instructions and parts list for

the Type VSX2 slam-shut are found in Instruction

Manual D103695X012. Instructions and parts list for

the Type VSX8 slam-shut are found in Instruction

Manual D103127X012.

Figure 1. 299H Series Pressure Reducing Regulator

Description

The 299H Series pressure reducing regulators provide

a broad capacity of controlled pressure ranges and

capacities in a wide variety of distribution, industrial

and commercial applications. A 299H Series regulator

has a pilot integrally mounted to the actuator casing.

The 299H Series regulators can handle inlet pressures

up to 175 psi / 12.1 bar depending on orifice size.

The integral token relief on the Types 299HR and

299HVR regulators is located in the pilot and opens to

relieve minor overpressure.

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The 299H Series Pressure Reducing Regulators are designed to provide accurate and reliable control of downstream pressure in a wide variety of industrial and commercial applications. These regulators are particularly suited for use in natural gas distribution systems, where they can handle a broad capacity of controlled pressure ranges. The 299H Series is available in several configurations, including the 299H, 299HR, and 299HV.

Function Description

The 299H Series regulators are pilot-operated, meaning a small pilot regulator controls the main valve to maintain the desired outlet pressure. This design allows for precise control and high capacity. The regulator operates by sensing the downstream pressure and adjusting the main valve opening to maintain the setpoint.

Internal Registration: In this configuration, the regulator senses downstream pressure through an internal passage. This is suitable for applications where the sensing point is close to the regulator.
External Registration: For more accurate control, especially in applications with varying flow rates or where the sensing point is remote from the regulator, external registration is used. A separate control line connects the downstream pipe to the pilot, providing a more representative pressure signal.
Dual Registration: This option combines both internal and external registration, allowing for flexibility in sensing locations and improved control under specific conditions.
Token Relief: The 299HR model includes a token relief feature, which provides overpressure protection by allowing a small amount of gas to bleed off if the downstream pressure exceeds a set limit. This helps prevent nuisance shutdowns and provides an additional layer of safety.
Slam-Shut Device: The 299HV model incorporates a Type VSX8 slam-shut device, which provides overpressure and/or underpressure protection by completely shutting off the flow of gas to the downstream system if pressure deviates beyond preset limits. This is a critical safety feature for many applications.

Important Technical Specifications

Maximum Inlet Pressure: Up to 175 psig / 12.1 bar.
Outlet Pressure Range:
- 299H: 3.5 to 69 mbar (0.05 to 1 psig) to 14 to 85 psig (0.97 to 5.9 bar).
- 299HR: 3.5 to 69 mbar (0.05 to 1 psig) to 14 to 85 psig (0.97 to 5.9 bar).
- 299HV: 3.5 to 69 mbar (0.05 to 1 psig) to 14 to 85 psig (0.97 to 5.9 bar).
Pressure Control Accuracy (Fixed Factor): ±1% of absolute control pressure.
Minimum Differential Pressure For Full Stroke: 1.5 psid / 0.10 bar d.
Control Line Connections: 3/4 NPT.
Temperature Capabilities: -20°F to 150°F / -29°C to 66°C.
Approximate Weight: 21 lbs / 10 kg.
Orifice Sizes: Various orifice sizes are available, ranging from 1/4 in. / 6.4 mm to 1-3/16 in. / 30 mm, to accommodate different flow capacities and pressure drops.
Body Sizes: Available in 1-1/2, 2, and 2-1/2 inch NPT and DN connections.
End Connection Styles: Cast iron (for Types 299H and 299HR only), ductile iron, and steel (for Types 299H and 299HR only).
Pilot Supply: The regulator can be supplied with an integral pilot supply or an external pilot supply.
Filter: A P590 Series filter is recommended for the pilot supply tubing to ensure clean gas and prevent clogging.

Usage Features

Versatility: The 299H Series is highly versatile, suitable for a wide range of applications in natural gas distribution, industrial, and commercial settings.
High Capacity: The design allows for high flow rates, making it suitable for demanding applications.
Accurate Control: Pilot operation ensures precise control of downstream pressure, maintaining stability even with varying inlet pressures or flow rates.
Overpressure Protection: The 299HR (token relief) and 299HV (slam-shut) models offer integrated overpressure protection, enhancing safety and system reliability.
Underpressure Protection: The 299HV model also provides underpressure protection, automatically shutting off flow if downstream pressure drops below a safe limit.
Easy Installation: The modular design and various connection options facilitate straightforward installation.
Remote Sensing: External registration allows for remote pressure sensing, which can improve control accuracy in complex piping systems or where the regulator is not located at the point of use.
Adjustability: The outlet pressure setpoint is easily adjustable by turning the spring seat on the pilot regulator.
Field-Reversible: The slam-shut device on the 299HV can be field-reversed for overpressure or underpressure protection.

Maintenance Features

Modular Construction: The modular design simplifies maintenance and repair, as individual components can be replaced without disassembling the entire regulator.
Easy Access to Components: Key components, such as the diaphragm, springs, and orifices, are easily accessible for inspection, cleaning, or replacement.
Pilot Regulator Maintenance: The pilot regulator can be serviced independently, reducing downtime.
Slam-Shut Device Maintenance: The Type VSX8 slam-shut device is designed for easy maintenance, with clear instructions for resetting and inspecting components.
Regular Inspection: Regular inspection of the regulator, including checking for leaks, debris, and proper operation of the pilot and main valve, is crucial for optimal performance and safety.
Lubrication: Specific components may require lubrication with appropriate lubricants (e.g., multi-purpose lubricant or anti-seize compound) during assembly or maintenance to ensure smooth operation and prevent corrosion.
Orifice Cleaning/Replacement: The main valve orifice and pilot orifices should be inspected and cleaned or replaced as needed to maintain proper flow and control.
Spring Replacement: Springs may need to be replaced if they become fatigued or damaged, affecting the regulator's setpoint and performance.
Diaphragm Inspection/Replacement: The main diaphragm and pilot diaphragm should be inspected for wear or damage and replaced if necessary to ensure proper sealing and operation.
Shutdown Procedures: Clear shutdown procedures are provided for safely isolating the regulator from pressure before performing any maintenance.
Troubleshooting Guide: The manual includes a comprehensive troubleshooting guide to assist in diagnosing and resolving common operational issues.
Parts List: A detailed parts list with part numbers is provided to facilitate ordering replacement components.