6.8 Flexible Connector

An approved flexible connector should always be used between stationary gas piping and the engine-mounted fuel system components. It should be at least six inches (15.3 cm) long or as recommended by the generator supplier based upon engine specifications.

6.9 Gas Piping

Gas piping should be Schedule 40 black iron pipe. Copper tubing may be used if the fuel does not contain hydrogen sulfide or other ingredients which will react chemically with copper. Fuel piping should never be used to ground electrical equipment. Piping should be sized according to the requirements of the equipment to be operated. Refer to the dimensional drawing for detailed information on your unit. In addition to the actual fuel consumption, the following factors must be considered:

DPressure loss due to length of pipe

DPressure loss due to other appliances on the same fuel supply

DPressure loss due to number of fittings

6.10 Fuel Regulators

Fuel regulators are compatible with both natural gas and LP gas. When used with natural gas the spring and retainer are installed. The spring and retainer are usually removed from the fuel regulator when used with LP gas. Refer to the appropriate generator set operation manual and/or decal on the unit for specific information regarding spring/retainer usage.

Gas fuels may require the fuel regulator to be mounted in a given position. The fuel regulator will function properly with the fuel regulator pointing downward for both natural gas and LP gas. The fuel regulator may be positioned so that it is pointing upward for use with natural gas only.

Two regulators are used in the typical gaseous fuel system:

DPrimary Regulator—This regulator provides initial control of the gas from the fuel supply. The primary regulator reduces line pressures to allowable inlet pressures for the secondary regulators on the system. This regulator would drop high pressure from a tank or transmission line to a low pressure, typically 4-6 ounces per square inch (1.7-2.6 kPa) or 7-11 inches (178-279 mm) of water column. This regulator is not usually supplied with the generator set, as conditions that dictate the type used vary depending on the method in which the fuel is supplied.

DSecondary Regulator—This low-pressure type regulator is mounted on the engine and is designed for a maximum inlet pressure of six ounces per square inch (2.6 kPa) or 11 inches (279 mm) of water column. The engine will operate satisfactorily at four ounces per square inch (1.7 kPa) or 7 inches (179 mm) of water column or less, but lower pressures may result in poor response to load changes or lack of power where the primary regulator is not near the engine.

Although regulators are designed to close and shut off fuel when the engine stops, a solenoid valve should be located ahead of the regulator and the flexible fuel connector to prevent the accumulation of an explosive mixture of gas and air, should either the flexible connection or regulator develop a leak. The generator set installer normally wires the solenoid valve to the engine starting controls so it will open (with battery power) when the engine cranks or runs.

Some fuel regulators have provisions to install a pressure gauge to test inlet and outlet pressures. If none are available, install pipe tees in the fuel line to serve this purpose and use pipe plugs on any unused openings.

32 Section 6 Fuel Systems

TP-5700 7/93

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Kohler 20--2800 kW manual Flexible Connector, Gas Piping, Fuel Regulators
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20--2800 kW specifications

The Kohler 20-2800 kW generator series is renowned for its exceptional performance and reliability, making it a prime choice for various industrial and commercial applications. Designed for continuous and backup power generation, these generators are capable of providing robust energy solutions for facilities that demand high capacity and efficiency.

One of the standout features of the Kohler 20-2800 kW series is its advanced technology integration. Kohler utilizes the latest in digital control systems, ensuring precise monitoring and management of generator functions. The generator's control panel provides real-time data on power output, fuel consumption, and operating conditions, allowing operators to make informed decisions quickly.

In terms of fuel efficiency, the Kohler generators are engineered to minimize operational costs while maximizing performance. The series includes options for both diesel and natural gas, offering flexibility depending on user requirements and availability. The efficient fuel consumption not only supports cost savings but also aligns with environmental standards, reducing emissions during operation.

Durability and reliability are key characteristics of this generator series. Kohler buildings are constructed using high-quality materials and components that withstand harsh environmental conditions. System redundancy features and robust cooling systems ensure that the generators can operate continuously without failure, making them ideal for critical power needs.

The Kohler 20-2800 kW series also includes noise-reducing technology, making them suitable for installations in noise-sensitive environments. With options for acoustic enclosures, these generators comply with local noise regulations while delivering powerful performance.

Safety features are integrated into the generator design, including automatic shutdown systems for over-speed, low oil pressure, and high water temperature, ensuring that the equipment operates safely during emergencies.

The modular design of the Kohler 20-2800 kW allows for easy installation and maintenance. Access points for service and diagnostics are strategically placed for convenience, reducing downtime and improving efficiency in upkeep.

Overall, the Kohler 20-2800 kW generator series stands out as a dependable powerhouse, combining advanced technology, fuel efficiency, durability, and safety features to meet the demands of various industries. Whether for data centers, manufacturing facilities, or large commercial buildings, Kohler's commitment to quality and innovation makes these generators an exemplary choice for reliable power generation.
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