MANUAL OF GLOBE VALVES

1. Introduction

Scope

This manual provides guidelines for the installation, operation, maintenance, inspection, warranty coverage, and service procedures for Globe Valves used in water supply, industrial, steam, chemical, and utility applications.

Applications

Globe Valves are designed for flow regulation, throttling, and isolation of fluids. They are commonly used in:

• Water Treatment Plants
• Steam Distribution Systems
• Industrial Process Pipelines
• Chemical Processing Plants
• Power Generation Facilities
• HVAC Systems
• Oil & Gas Installations
• Utility Services

Unlike gate valves, Globe Valves are specifically designed for accurate flow control and throttling operations.

2. Installation Guidelines

Pre-Installation Inspection

Before installation:

• Verify valve size, pressure rating, and material compatibility.
• Inspect the valve for transportation damage.
• Check seating surfaces and stem movement.
• Ensure valve internals are clean and free from foreign particles.

Pipeline Preparation

• Thoroughly clean and flush the pipeline.
• Remove welding slag, rust, scale, and debris.
• Ensure proper pipeline alignment.
• Provide adequate support for the pipeline.

Flow Direction

• Install according to the flow direction arrow marked on the valve body.
• Proper flow direction ensures optimum sealing performance and service life.

Valve Orientation

• Horizontal or vertical installation is acceptable.
• Prefer vertical stem orientation whenever possible.
• Ensure adequate clearance for handwheel operation and maintenance access.

Flange Installation

• Use suitable gasket material.
• Tighten flange bolts evenly using a cross pattern.
• Avoid excessive bolt torque.

Installation Precautions

• Do not use the handwheel for lifting.
• Avoid excessive pipeline stresses on the valve body.
• Ensure valve is partially open during installation where practical.

3. Operation Instructions

Opening Procedure

1. Rotate handwheel counterclockwise.
2. Open gradually to avoid sudden pressure changes.
3. Stop when desired flow rate is achieved.
4. For full open operation, avoid excessive force.

Closing Procedure

1. Rotate handwheel clockwise.
2. Close gradually.
3. Ensure disc is properly seated.
4. Do not over-tighten the handwheel.

Throttling Operation

Globe Valves are specifically designed for:

• Flow regulation
• Pressure control
• Throttling service
• Partial opening operation

Operating Precautions

• Operate within rated pressure and temperature limits.
• Avoid excessive operating force.
• Do not use extension bars on handwheels.
• Prevent rapid opening and closing.

4. Maintenance Schedule

Monthly Inspection

• Check for external leakage.
• Inspect gland packing.
• Verify smooth handwheel operation.
• Check flange joints.

Quarterly Inspection

• Lubricate stem threads.
• Inspect packing condition.
• Examine handwheel and operating mechanism.
• Check body coating condition.

Annual Inspection

• Inspect disc and seat surfaces.
• Examine stem wear.
• Replace packing if necessary.
• Inspect bonnet gasket.
• Conduct pressure testing.

Recommended Spare Parts

• Disc Assembly
• Seat Ring
• Stem / Spindle
• Packing Set
• O-Rings
• Bonnet Gasket
• Fasteners

5. Warranty Coverage

Warranty Exclusions

Warranty does not cover:

• Improper installation.
• Operation beyond rated pressure or temperature.
• Corrosion due to incompatible media.
• Mechanical damage.
• Unauthorized modifications.
• Excessive operating force.
• Normal wear and tear.

6. Expected Service Life

Factors Affecting Service Life

• Fluid Characteristics
• Operating Pressure
• Temperature Conditions
• Frequency of Operation
• Throttling Service Conditions
• Maintenance Practices
• Environmental Exposure

Regular maintenance significantly increases service life.

7. Customer Responsibilities

The customer shall:

• Ensure correct installation.
• Operate within rated service conditions.
• Maintain inspection and maintenance records.
• Conduct periodic maintenance.
• Protect the valve from physical damage.
• Report operational abnormalities promptly.
• Follow recommended operating practices.

Failure to comply may affect warranty eligibility.

8. Warranty Claim Procedure

Step 1 – Claim Submission

Provide:

• Purchase Order Number
• Invoice Copy
• Valve Identification Details
• Installation Date
• Description of Defect
• Photographs of Valve and Installation

Step 2 – Technical Assessment

The submitted information will be reviewed to determine:

• Installation compliance
• Operating conditions
• Maintenance history
• Warranty applicability

Step 3 – Inspection

Where required:

• Site inspection may be conducted.
• Valve may be requested for factory examination.

Step 4 – Resolution

Based on technical findings:

• Repair
• Component Replacement
• Valve Replacement
• Technical Recommendations

will be provided according to warranty terms.

Safety Precautions

• Depressurize the system before maintenance.
• Never dismantle the valve under pressure.
• Wear appropriate PPE during servicing.
• Use approved lifting methods for large valves.
• Follow plant safety procedures.

Document Retention

Maintain installation records, maintenance logs, inspection reports, and warranty documentation throughout the service life of the valve for operational reference and warranty support.