• Preferred Utilities | Fuel Oil Handling
• Preferred Instruments | Boiler Controls
• W.N. Best | Combustion Systems
• Preferred Engineering | Nuclear Outage Support

Preferred Utilities

Preferred Utilities engineers and fabricates fuel oil handling systems for diesel generators and dual-fuel fired boilers for mission critical facilities such as data centers, hospitals, and emergency response facilities.

• Fuel Oil Transfer Pump Sets
• Day Tanks
• Fuel Filtration Systems
• Fuel Oil Heaters and Assemblies
• Tank Monitoring
• Pump and Motor Assemblies
• Fuel Oil Specialties
• Diesel Fuel Oil Additives and Treatments

Preferred Instruments

Preferred Instruments manufactures microprocessor based controllers, instruments, and electric actuators for combustion and process applications. Preferred Instruments also manufactures oil tank gauging and leak detection equipment.

• Actuators
• Control Systems
• Controllers
• Flame Safeguard Components
• Monitoring Systems
• Transmitters and Sensors

W.N. Best

W. N. Best Combustion Equipment, founded in 1890, manufactures industrial #2 through #6 oil and gas burners, along with specialty systems and burners for thermal decomposition of sludge and contaminated petroleum products for product regeneration and heat recovery.

• AP Burner
• Register Burners
• Thermopak Burners
• Waste Fuel Burners

Preferred Engineering

Formed in 1980, Preferred Engineering engineers and manufactures Outage Support Equipment for nuclear power plants. Products include: Main steam line plugs for MSIV testing, Stud hole plugs, remotely actuated lifting devices, quick lock fastening and seal systems and many others.

• Cleaners
• Lifting and Structures
• O-Ring Products
• Plugs
• Refueling Apparatus
• Seals and Covers

Back Pressure Regulating Valves, Model V

The Model V Back Pressure Regulating Valve is a self-operated spring-loaded back pressure regulating valve.  Typically the Model V is installed at the far end of the oil supply line, down stream of the boiler fuel metering valves and passes unburned oil to the return line.

Application

The Model V Back Pressure Regulating Valve is a self operated, spring-loaded back pressure regulating valve. Typically the Model V is installed at the far end of the oil supply line, down stream of the boiler fuel metering valves and passes unburned oil to the return line. Alternately, the Model V may be installed upstream of the boiler fuel metering valves. In both cases the valve passes oil to the return line in order to maintain a constant supply pressure to the fuel metering valves.

Features

• Self Operated Spring Loaded Back Pressure Regulating Valve
• Cast Iron Body
• Stainless Steel Diaphragm

Overview

The Model V Back Pressure Regulating Valve is a self-operated spring-loaded back pressure regulating valve.  Typically the Model V is installed at the far end of the oil supply line, down stream of the boiler fuel metering valves and passes unburned oil to the return line.  Alternately, the Model V may be installed upstream of the boiler fuel metering valves.  In both cases the valve passes oil to the return line in order to maintain a constant supply pressure to the fuel metering valves.

The Model V is a 1" NPT, 250 lb. cast iron body, balanced cage, hardened and polished stainless steel trim.  The 30 to 150 PSI range valve has a Teflon seat and stainless steel diaphragm while other ranges have Viton seats and six (6) ply Teflon composition diaphragms for increased responsiveness.  The valve capacities are shown in the table below. 

Specification

Provide and install a Back Pressure Regulating Valve as shown on the contract drawings.  The valve shall be a 1" NPT Preferred Utilities Manufacturing Corporation, Danbury, CT, Model V.  The valve shall be diaphragm operated with 250 lb cast iron body, hardened stainless steel trim with an adjustable spring range from _____ to _____ psig.

DOCUMENTS & DOWNLOADS

Back Pressure Regulating Valve, Model V - Catalog Cutsheet Back Pressure Regulating Valve, Model V - Datasheet.pdf

RELATED PRODUCTS

PRODUCT GROUPS