Woodward 8402-271 SOGAV105 Gas Admission Valve

Description

Key Technical Specifications

Woodward’s current product-history system instructs users to identify the part number and serial number from the product label when checking maintenance, service, or upgrade information. For an older 8402-271, that serial-specific lookup is important because supplier listings can contain conflicting technical descriptions.

Multiple industrial-spare-parts sources identify 8402-271 as Woodward SOGAV105, with applications associated with Wärtsilä gas engines. One supplier specifically identifies the item as a Woodward valve SOGAV105.

Product Introduction

The Woodward 8402-271 SOGAV105 is a gas-control component associated with Wärtsilä gas-engine fuel systems. Its function is related to controlled admission of fuel gas into the engine, making the exact valve configuration important when replacing an installed unit.

Do not select a replacement based only on the 8402-271 number and external appearance. Valve configuration, engine application, mechanical interface, electrical connection, and fuel-gas requirements should be checked against the installed part and OEM documentation. Woodward provides a product-history lookup based on the unit’s label and serial number.

Installation & Configuration Guide

Stage 1: Pre-Installation Preparation

Estimated time: 30–45 minutes

1. Notify operations and place the engine in the approved maintenance state.
2. Shut down the engine using the manufacturer’s normal procedure.
3. Apply LOTO to electrical and fuel-gas energy sources.
4. Isolate the fuel-gas supply.
5. Vent and depressurize the applicable gas circuit according to the engine manufacturer’s procedure.
6. Verify zero pressure before opening the fuel system.
7. Wear appropriate PPE and use an ESD strap when handling electrical connections.
8. Prepare:
   • Digital multimeter
   • Appropriate hand tools
   • Torque wrench
   • Wire labels
   • Camera/phone
   • Replacement seals/gaskets specified by the engine manufacturer
   • Current Wärtsilä/Woodward documentation
9. Photograph the existing valve from several angles.
10. Record the complete 8402-271 nameplate, revision, and serial number.
11. Record the valve orientation and gas-flow direction.

⚠️ Fuel gas must be treated as a hazardous energy source. Do not loosen a connection until the applicable isolation, depressurization, and gas-free procedures have been completed.

Stage 2: Removing the Old Valve

Estimated time: 30–45 minutes

1. Confirm the fuel-gas circuit is isolated and depressurized.
2. Verify the work area is safe for opening the gas system.
3. Photograph the existing electrical connector.
4. Label electrical conductors before disconnection.
5. Disconnect the electrical connection without pulling on the cable.
6. Mark the valve’s orientation and flow direction.
7. Remove the mechanical fasteners.
8. Remove the valve without damaging adjacent fuel-gas tubing.
9. Remove and inspect the sealing surfaces.
10. Compare the removed valve with the replacement.
11. Check the mounting interface for contamination or mechanical damage.
12. Retain the original unit until commissioning is complete.

⚠️ Do not reuse a sealing component unless the OEM procedure explicitly permits it. A small leak at a fuel-gas connection can create a serious operational hazard.

Stage 3: Installing the New Valve

Estimated time: 30–45 minutes

1. Verify the replacement marking is Woodward 8402-271.
2. Confirm the serial-specific and engine-specific application.
3. Compare the valve body, connector, mounting pattern, and flow direction with the removed unit.
4. Install the specified new seal or gasket.
5. Position the valve in the original orientation.
6. Tighten mounting hardware using the applicable OEM torque specification.
7. Reconnect the electrical connector.
8. Verify connector engagement and locking.
9. Check that the wiring is clear of hot or moving engine components.
10. Inspect the complete installation before restoring gas pressure.

Self-Checklist

• Exact part number verified
• Serial/revision recorded
• Flow direction correct
• New approved seal installed
• Mounting hardware torqued
• Electrical connector locked
• Fuel-gas isolation still controlled

Stage 4: Power-On & Testing

Estimated time: 45–90 minutes

1. Confirm all mechanical and electrical connections.
2. Confirm the fuel-gas system is ready for controlled pressurization.
3. Restore fuel-gas pressure according to the engine procedure.
4. Perform the specified leak check.
5. Inspect the valve and surrounding connections for leakage.
6. Energize the applicable control circuit.
7. Check the engine control system for valve-related alarms.
8. Start the engine using the approved commissioning procedure.
9. Monitor gas admission and engine operating parameters.
10. Verify that the control system receives the expected valve status where applicable.
11. Check for abnormal vibration, temperature, or gas leakage.
12. Record the replacement part number and serial number in the maintenance record.

⚠️ Do not bypass an engine control-system interlock to force the valve into operation. If the valve does not respond as expected, stop the commissioning sequence and verify the electrical, mechanical, and control-system interfaces.

8402-271

8402-271

Frequently Asked Questions (FAQ)

1. What is Woodward 8402-271?

The 8402-271 is identified by several industrial suppliers as a Woodward SOGAV105 gas-control valve associated with Wärtsilä gas-engine applications.

2. Is 8402-271 a speed-control module?

No. Current supplier records identify 8402-271 as a SOGAV105 valve, not as a generic digital governor module. Some online listings incorrectly describe the same part number as an electronic speed controller, so the physical nameplate and OEM documentation should take precedence.

3. What engines use the 8402-271?

Available supplier documentation associates the part with Wärtsilä gas-engine systems, including marine and power-generation applications. The exact engine model should be verified before ordering because gas-valve configuration can be engine-specific.

4. Can I substitute another 8402-series part?

Do not assume that another 8402-series number is interchangeable. Verify the complete part number, valve configuration, mounting interface, electrical connection, flow characteristics, and engine application.

5. Is Woodward 8402-271 obsolete?

Some current industrial suppliers list 8402-271 as discontinued, but availability and replacement status can depend on the original OEM engine configuration. Woodward’s product-history lookup is the appropriate source for checking historical product information using the unit’s part and serial numbers.

6. What should I request when purchasing a surplus 8402-271?

Request clear photographs of the actual nameplate, serial number, revision, valve body, connector, and mounting interface. For a used unit, request inspection or test records. Do not rely solely on a generic catalog photograph because several online listings provide contradictory descriptions for this part number.

7. Does 8402-271 require special commissioning?

Yes. Because it is associated with a fuel-gas system, commissioning should include mechanical verification, controlled gas pressurization, leak checking, electrical verification, and engine-system functional testing. Follow the applicable Wärtsilä and Woodward procedures rather than using a generic valve commissioning procedure.