Type EZL Pressure Reducing Regulator for Low Differential Pressure Application

Product catalog summary

Introduction
The Type EZL Pressure Reducing Regulator is engineered for low differential pressure applications in natural gas distribution, ensuring precise and reliable pressure control. It features a pilot-operated, pressure-balanced, and soft-seated design, suitable for district regulating stations and commercial/industrial meter sets. An optional slam-shut device provides overpressure and underpressure protection.

Features

Low Differential Applications: Manages pressure differentials as low as 2.9 psid / 0.2 bar d.
Bubble-Tight Shutoff: Ensures a secure shutoff with a knife-edged metal plug and soft seat.
No Atmospheric Bleed: Employs a self-contained control system to prevent gas bleed to the atmosphere.
Easy In-Line Maintenance: Allows for inspection and replacement of parts without removing the pipeline.
Precise Pressure Control: Maintains stable downstream pressure despite inlet variations.
High Corrosion Resistance: Anodized casings offer excellent resistance, even below grade.
Full Pressure Rating: Inlet and outlet pressure rating of 290 psig / 20 bar.
Integral Slam Shut Configurations: Shuts off gas in overpressure or underpressure conditions.
High Turn Down Capability: Features an oversized diaphragm and unique piloting system for superior control.
Common Body Platform: Compatible with other Fisher™ E-Body products for easy conversion.
Full Usable Capacity: Laboratory tested for 100% flow capacity usage.

Specifications

Body Sizes and Pressure Ratings: Available in various sizes and connection styles, with a maximum pressure of 290 psig / 20.0 bar.
Process Temperature Capabilities: Nitrile version: -20 to 180°F / -29 to 82°C; Fluorocarbon version: 0 to 180°F / -18 to 82°C.
Construction Materials: Main body made of cast iron or WCC steel, with various materials for other components.

Principle of Operation
The regulator uses inlet pressure as the medium, reduced through pilot operation to load the actuator diaphragm. The outlet pressure opposes the loading pressure and the pilot control spring. When outlet pressure drops, the pilot valve opens, increasing loading pressure and opening the main valve plug to supply flow. Excess loading pressure escapes downstream through the pilot.

Monitoring Systems
Monitoring regulation provides overpressure protection without venting to the atmosphere. In wide-open monitoring systems, the working regulator controls outlet pressure, while the monitor regulator takes over if the working regulator fails. Working monitoring systems use two pilots for continuous operation and easy testing.

Pilot Descriptions

Type 6352: Outlet pressure range of 2 to 10 psig / 0.14 to 0.69 bar.
Type 6353: Outlet pressure range of 3 to 125 psig / 0.21 to 8.6 bar.
Type 6354L: Outlet pressure range of 85 to 200 psig / 5.9 to 13.8 bar.
Type 61L: Low pressure pilot for outlet pressure range of 0.25 to 20 psig / 0.02 to 1.38 bar.
Type 61HP: Extra high pressure pilot for outlet pressure range of 15 to 290 psig / 1.03 to 20.0 bar.

Slam-Shut Device Principle of Operation
The slam-shut device provides overpressure and underpressure protection by shutting off gas flow to the downstream system, using a diaphragm, piston, or bellows opposed by a setpoint control spring.

Specifications
The document provides detailed specifications for Type EZLOSX and Type EZL regulators, including body sizes, materials, and pressure ranges. It includes tables listing capacities, dimensions, and shipping weights for various configurations.

Procedures
Ordering instructions are provided, detailing options for body size, material, end connection style, main valve seat material, outlet pressure range, pilot elastomer material, and optional features like travel indicators and replacement parts kits.

Standards and Norms
The document outlines the availability of products based on shipping times and specifies that all sales are governed by Emerson's terms and conditions. It emphasizes that the information is for informational purposes only and not a warranty or guarantee.

Recommendations
Users are advised to consult local sales offices for availability and to ensure proper selection, use, and maintenance of the products. The document also provides contact information for Emerson Automation Solutions across different regions.

Key Data from Tables
Tables provide detailed data on capacities for different body sizes and pressure ranges, dimensions with slam-shut mechanisms, and approximate shipping weights. These tables are crucial for selecting the appropriate regulator configuration.

Critical Information
Important parameters include maximum and minimum inlet pressures, differential pressure, set pressure, and maximum flow. The document also highlights the importance of accuracy requirements and construction material specifications.

Catalog excerpts

Type EZL Pressure Reducing Regulator for Low Differential Pressure Application-1

Type EZL Pressure Reducing Regulator for Low Differential Pressure Applications Figure 1. Type EZL Pressure Reducing Regulator Features • Low Differential Applications—Can accurately control at pressure differentials as low as 2.9 psid / 0.2 bar d. • Bubble-Tight Shutoff—A knife-edged metal plug and soft seat provide bubble tight shutoff for use in applications where positive shutoff is required such as dead-end systems. • No Atmospheric Bleed—Eliminates nuisance and wasteful bleed gas to atmosphere by utilizing a selfcontained control system, which bleeds 100% of the gas to the downstream system. • Easy In-Line Maintenance—The light-weight top entry design enables trim parts to be inspected, cleaned and replaced without removing the body from pipeline. • Precise Pressure Control—Provides stable and accurate downstream pressure control regardless of inlet pressure variations or demand changes. • High Corrosion Resistance—Anodized casings provide excellent corrosion resistance even in below-grade installations. • Full Pressure Rating—The equal inlet and outlet pressure rating of 290 psig / 20 bar, which allows easier selection and requires no special startup or shutdown procedures. • Integral Slam Shut Configurations—Type EZL-OSX discontinues gas service by shutting the gas off if there is an overpressure or underpressure condition. • High Turn Down Capability—The oversized diaphragm and unique piloting system allow for high turn down, providing superior pressure control in systems with large variations in downstream flow demand. • Common Body Platform—The Type EZL uses the same standard Fisher™ E-Body as the Types EZH and EZR pressure reducing regulators and Types EZ, ES, ED and ET pressure reducing control valves. This allows easy conversion from one product to another without the need to remove the E-Body from the pipeline. • Full Usable Capacity—Fisher regulators are laboratory tested. 100% of the published

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Type EZL Pressure Reducing Regulator for Low Differential Pressure Application-2

Type EZL Specifications The Specifications section lists the specifications for Type EZL pressure reducing regulator. Factory specifications for specific regulator constructions are stamped on the nameplate fastened to either the main actuator or the pilot spring case. Body Sizes, End Connection Styles and Pressure Ratings(1) See Table 1 Maximum Inlet and Outlet (Casing) Pressures(1) 290 psig / 20.0 bar Maximum Emergency (Design Casing Pressure)(1) 290 psig / 20.0 bar Maximum Operating Differential Pressure(1) 290 psid / 20.0 bar d Minimum Differential Pressure(1) MINIMUM DIFFERENTIAL FOR FULL...

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Type EZL Pressure Reducing Regulator for Low Differential Pressure Application-3

Type EZL Type EZL Type EZL with 6350 Series Pilot and Type P590 Pilot Supply Filter June 2015 “C” PORT LOADING PRESSURE “D” PORT SENSE PRESSURE “A” PORT INLET PRESSURE P590 SERIES PILOT SUPPLY FILTER INLET PRESSURE TYPE EZL MAIN VALVE INLET PRESSURE PRESSURE OUTLET OUTLET PRESSURE ATMOSPHERIC LOADING 2015 PRESSURE PRESSURE August LOADING PRESSURE ATMOSPHERIC PRESSURE Type EZL with Type 61L Pilot Figure 2. Principle of Operation for the Type EZL with Type 6352 Pilot INLET PRESSURE SENSE PRESSURE LOADING PRESSURE P590 SERIES PILOT SUPPLY FILTER TYPE 61L PILOT INLET PRESSURE ATMOSPHERIC PRESSURE...

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Type EZL Pressure Reducing Regulator for Low Differential Pressure Application-4

Type EZL Table 1. Main Valve Body Sizes, End Connection Styles and Body Ratings MAIN VALVE BODY SIZE MAIN VALVE BODY MATERIAL Cast Iron 1. Structural Design Rating is the rating for the main valve body. The Type EZL complete assembly is limited to 290 psig / 20.0 bar. 2. Only available in 2 in. / DN 50 body sizes. Table 2. Outlet (Control) Pressure Ranges OUTLET (CONTROL) PRESSURE RANGE PILOT TYPE SPRING COLOR SPRING PART NUMBER APPROXIMATE PROPORTIONAL BAND psig Blue Blue Green Red Yellow Blue Brown Green White Yellow Black Green Blue Red 1. Without diaphragm limiter. 2. With diaphragm limiter....

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Type EZL Pressure Reducing Regulator for Low Differential Pressure Application-5

Type EZL Downstream Wide-Open Monitor P590 SERIES PILOT SUPPLY FILTER TYPE 67C PILOT SUPPLY REGULATOR P590 SERIES PILOT SUPPLY FILTER TYPE 6352 PILOT wnstream Wide-Open Monitor INTERMEDIATE PRESSURE INTERMEDIATEPRESSURE PILOT SUPPLY PRESSURE August 2015SUPPLY PRESSURE TYPE EZL MAIN VALVE TYPE EZL MAIN VALVE INLET PRESSURE OUTLET PRESSURE LOADING PRESSURE ATMOSPHERIC PRESSURE INTERMEDIATE PRESSURE INLET PRESSURE OUTLET PRESSURE INLET PRESSURE INLET PRESSURE ATMOSPHERIC PRESSURE OUTLET PRESSURE OUTLET PRESSURE LOADING PRESSURE INTERMEDIATE PRESSURE LOADING PRESSURE LOADING PRESSURE PILOT SUPPLY...

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Type EZL Pressure Reducing Regulator for Low Differential Pressure Application-6

Type EZLOSX Type EZLOSX EQUALIZER BYPASS VALVE PLUG DISK MANOMETRIC DEVICE STEM INLET PRESSURE INLET PRESSURE VALVE PLUG MANOMETRIC DEVICE OUTLET PRESSURE OUTLET PRESSURE E0971 ATMOSPHERIC PRESSURE LOADING PRESSURE LOADING PRESSURE ATMOSPHERIC PRESSURE Figure 6. Type EZLOSX Operational Schematic INLET PRESSURE When using OUTLET PRESSURE a 6350 Series pilot on the monitoring regulator, it LOADING PRESSURE should be equipped PRESSURE pilot supply regulator set to 5 psig / with a ATMOSPHERIC 0.34 bar plus the monitor minimum differential pressure above the working regulator pressure setting. Since...

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Type EZL Pressure Reducing Regulator for Low Differential Pressure Application-7

Type EZL Table 3. Working Monitor Pilot Performance MONITORING PILOT INFORMATION OUTLET (CONTROL) PRESSURE RANGE MONITOR PILOT FOR WORKING MONITOR APPLICATION SPRING COLOR SPRING PART NUMBER White Yellow Black Green Blue Red MINIMUM PRESSURE OVER NORMAL OUTLET PRESSURE AT WHICH WORKING MONITOR PILOT CAN BE SET 1. Operating range is limited to maximum pressure. Table 4. Applications and Construction Guide (See Figure 7) APPLICATION MANOMETRIC SENSING DEVICE REQUIRED Overpressure Shutoff (OPSO) Underpressure Shutoff (UPSO) Overpressure Shutoff (OPSO) and Underpressure Shutoff (UPSO) Overpressure...

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Type EZL Pressure Reducing Regulator for Low Differential Pressure Application-8

Type EZL TYPE BM1 TYPE BM2 TYPE BMS1 (RIGHT SIDE) TYPE BMS2 (LEFT SIDE) MECHANISM BOX (TYPE BM2) WITH 2 MANOMETRIC SENSING DEVICES (TYPES BMS1 AND BMS2) MECHANISM BOX (TYPE BM1) WITH 1 MANOMETRIC SENSING DEVICE (TYPE BMS1) Figure 7. Types of Slam-Shut Installation Table 5. Spring Ranges, Part Numbers and Maximum and Minimum Pressures for Types BMS1 and BMS2 SPRING RANGE SPRING SPRING PART COLOR NUMBER MANOMETRIC SENSING DEVICE TYPE MANOMETRIC SENSING DEVICE STYLE MAXIMUM SENSING INLET PRESSURE, psig / bar SETPOINT TOLERANCE, psig / bar(1) MAXIMUM DIFFERENCE BETWEEN OVERPRESSURE AND UNDERPRESSURE,...

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