Fisher Type 114PL High-Pressure Reducing and Low-Flow System

Introduction

This manual provides instructions for the installation, startup, adjustment, and maintenance of the Type 114PL Pressure Reducing System. For pilot maintenance, instructions, and parts lists, refer to the Type BSL85 Instruction Manual, D103711X012.

Product Description

Type 114PL

The Type 114PL High-Pressure Reducing and Low-Flow System is configured with three Type BSL85 Pilots (refer to Instruction Manual, D103711X012). Two of these pilots are pneumatically loaded, while the third is spring-loaded. This system is designed for high-pressure reduction applications with low-flow conditions.

Type RPE (Electric Heater)

The Type RPE Electric Heater can be used in conjunction with the Type 114PL. The Type RPE is utilized for reheating gas supplied to pressure reducing regulator pilots. This helps to prevent inconveniences caused by freezing that can occur during significant pressure drops. (Refer to Instruction Manual, D103694X012).

Specifications

The specifications for the Type 114PL Pressure Reducing System are listed below. Factory specifications are stamped on the nameplate attached to the regulator.

• Body Sizes and End Connection Styles: DN 25 / 1 NPS - CL600 Flanged
• Outlet Pressure Range (Pd): 1.0 to 18 bar / 14.5 to 261 psig (See Table 1)
• Maximum Allowable Operating Pressure (Ps): 100 bar / 1450 psig
• Maximum Obtainable Operating Pressure (Pu): 85 bar / 1233 psig

Construction Materials

• Pilot Body: Steel
• Pilot Manometric Box BMP (spring case): Steel
• Pilot Manometric Box BMP (cover): Steel
• Flange and spacer: Steel

Option: RPE (Electric Heater)

Table 1. Outlet Pressure Ranges

Note: Pressure/temperature limits in this manual or applicable standards should not be exceeded. Extreme conditions include isopropanol, methanol.

Principle of Operation

The Type 114PL High-Pressure Reducing and Low-Flow System utilizes inlet pressure as the operating medium. This pressure is reduced by the spring-loaded pilot to load the cases of the pneumatic-loaded pilots. When the outlet pressure (Pd) decreases, the motorization pressure (Pm) causes the nozzles in the pneumatic-loaded pilots to open further, supplying the necessary flow to the downstream system. Any excess motorization pressure on the actuator diaphragm is vented through a bleed restriction in the pilot. When the gas demand in the downstream system is met, the outlet pressure (Pd) rises. Consequently, the outlet pressure closes the nozzles in the pneumatic-loaded pilots until the set value is reached.

Installation

Service conditions must not exceed the limits specified in the characteristics section, on the nameplate, or any rating of adjacent piping or connections. To prevent injury or damage, install pressure-relieving or pressure-limiting devices. Ensure installation complies with all applicable codes and regulations.

Physical damage to the system can cause a pilot to break off the main valve, leading to personal injury and property damage from bursting pressure-containing parts. Install the regulator in a safe location. Only personnel qualified through training and experience should install, operate, and maintain a regulator.

Before installation, verify that the system is free from damage or debris.

General Installation Steps:

1. Install the regulator so the flange connected to the spring-loaded pilot's feeding is at the inlet side.
2. Use gaskets between pipeline and system flanges.
3. Connect the sensing line to the downstream.

Installation Guidance:

• Ensure all tubing and piping are clean and unobstructed.
• The system battery should be installed on a horizontal pipeline. Installation according to EN 12186 is recommended.
• When assembling with adjacent elements, avoid creating pressure force on the body. Assembling elements (bolts, O-rings, flanges) must be compatible with the equipment's geometry and working conditions.
• Connect the impulse line with a minimum distance of 4 x D to a straight run of the outlet pipe.
• Do not modify the equipment structure (e.g., drilling, grinding, soldering). It is recommended to install a servicing valve on the outlet pipeline for adjustments and bleeding to the atmosphere.

Operational and Safety Notes:

• The equipment should not be subjected to shock, especially the release relay. Users should ensure appropriate environmental protection.
• Standard regulators do not account for fire, seismic, or lightning actions. Special product selection or calculations may be required for specific needs.
• Regulators may vent gas to the atmosphere. In hazardous or flammable gas service, vented gas can accumulate, causing injury, death, or property damage due to bursting of pressure-retaining parts. Vent regulators in hazardous gas service to a remote, safe location away from air intakes or hazardous areas.
• The vent line or stack opening must be protected against condensation or clogging.

Initial Verification

• PM unscrewed
• RM1 open
• RP1 open 3/4 turn
• R1, R2, R3, V1, V2 closed

Startup

1. Slowly open V1 (upstream valve).
2. Slowly open R1 and check for leakage of pilot nozzle PM by observing the absence of pressure rise on the downstream pressure gauge.
3. Slowly open R2 and check for leakage of the BPM1 nozzle by observing the absence of pressure rise on the downstream pressure gauge.
4. Slowly open R3 and check for leakage of the BPM2 nozzle by observing the absence of pressure rise on the downstream pressure gauge.
5. Adjust PM to the required value Pd (read on M1 if necessary, using valve P1).

Maintenance

Disassembly

Check for the absence of pressure between inlet and outlet valves before disassembly.

Recommended Frequency

Every year:

• Disassemble the manometric boxes and nozzles.
• Inspect O-rings, diaphragms, and grease.

Parts Ordering

When contacting a local Sales Office for this regulator, provide the type number and all pertinent information stamped on the nameplate. Specify the 11-character part number when ordering new parts. Refer to the Type BSL85 Instruction Manual, D103711X012, for the parts list.

Diagram Descriptions

Figure 1. Type 114PL

A photograph showing the Type 114PL High-Pressure Reducing and Low-Flow System. It is a complex assembly of interconnected regulators, piping, and fittings, indicating a robust industrial application.

Figure 2. Type 114PL Operational Schematics

A schematic diagram illustrating the operational flow of the Type 114PL system. It depicts various components labeled with alphanumeric codes (e.g., V1, R1, PM, Pd) connected by lines representing gas flow paths. Key components include isolation valves (V1, V2), pilot valves (R1, R2, R3, RP1, RM1), pneumatic boxes (BPM1, BPM2), a manometer (M1), and pressure points (Pu, Pm, Pd). The diagram shows how inlet pressure (Pu) is regulated and distributed to control the system's output pressure (Pd).