NIBCO GD-4765 - Technical Specs

When contractors or facility managers search for the NIBCO GD-4765 butterfly valve, they are primarily looking for the equipment. Still, before any replacement or purchase, they need reliable technical data, clear installation instructions, and assurance of compatibility.

This article provides a technical overview of the NIBCO GD-4765 grooved butterfly valve, including dimensions, material list, installation tips, and the most common applications. The goal is to help you make informed decisions for commercial and industrial systems.

What Is the NIBCO GD-4765 Butterfly Valve?

The NIBCO GD-4765 is a grooved-end butterfly valve designed for flow isolation in HVAC, fire protection, and general mechanical piping systems.

It is commonly selected for commercial HVAC systems, industrial water distribution, and fire protection piping (when applicable). The grooved design enables faster installation, reduced labor costs, and easier future modification.

NIBCO® Butterfly Valves

NIBCO GD-4765 Technical Specs Overview

Understanding the technical specs is critical for proper valve selection and system compatibility.

Typical considerations include:

Valve Type: Grooved butterfly valve
Connection: Grooved ends
Operation: Manual or actuated (depending on configuration)
Pressure Rating: Maximum Pressure rating 200 PSI
Temperature Range: Maximum temperature rating of 200°F EDPM disc
Materials: Ductile iron body, resilient seat

Note: The NIBCO GD-4765 is fitted with an EDPM Liner. It is important to note that NIBCO also offers a Buna-N Liner option; the corresponding model is GD-4775, with a maximum temperature rating of 180°F.

NIBCO GD-4765 Material List

Number	Part	Specification
1.	Upper Stem	Stainless Steel ASTM A582 Type 416
2.	Upper Bearing	Split Metal
3.	O-Ring	EPDM
4.	Body	Ductile Iron ASTM A395 w/Polyamide Coating
5.	Disc	Ductile Iron ASTM A395 w/EPDM
6.	Lower Bearing	Split Metal
7.	Lower Stem	Stainless Steel ASTM A582 Type 416
8.	Dust Plug	PVC
9.	Name Plate	Aluminum

For the GD-4775 version, the O-Ring (3) and Disc (5) are made using BUNA-N.

Below are the NIBCO GD-4765 sizes available:

GD-4765 Butterfly Valve 2'' - NIBCO NLK680D, 2 in. Butterfly Valve Ductile Iron, Grooved, 300 PSI
GD-4765 Butterfly Valve 2-1/2'' - NIBCO NLK680E, 2-1/2 in. Butterfly Ductile Iron, Grooved, 300 PSI
GD-4765 Butterfly Valve 3'' - NIBCO NLK680F, 3 in. Butterfly Valve Ductile Iron, Grooved, 300 PSI
GD-4765 Butterfly Valve 4'' - NIBCO NLK680H, 4 in. Butterfly Valve Ductile Iron, Grooved, 300 PSI
GD-4765 Butterfly Valve 5'' - NIBCO NLK680J, 5 in. Butterfly Valve Ductile Iron, Grooved, 300 PSI
GD-4765 Butterfly Valve 6'' - NIBCO NLK680K, 6 in. Butterfly Valve Ductile Iron, Grooved, 300 PSI
GD-4765 Butterfly Valve 8'' - NIBCO NLK680L, 8 in. Butterfly Valve Ductile Iron, Grooved, 300 PSI
GD-4765 Butterfly Valve 10'' - NIBCO NLK690M, 10 in. Butterfly Valve Ductile Iron, Grooved, 300 PSI

Note: The models listed above have standard arrangements and operators. To check special arrangements and features, please contact the Liberty Supply Sales Team.

NIBCO GD-4765 - Dimensions and Weights

One of the most searched topics on the web is “NIBCO butterfly valve dimensions”, and for good reason - incorrect sizing leads to installation issues and costly delays. When evaluating NIBCO GD-4765 dimensions, it's important to consider:

Face-to-face dimensions
Disc clearance
Groove specifications
Valve weight (for support and handling)

Below the Valve dimensions table:

Installation Requirements for the GD-4765

Proper valve installation is essential for performance and longevity. We've listed some key points that must be considered when installing the NIBCO GD-4765:

Ensure correct groove alignment and coupling installation
Verify disc clearance before tightening
Install in correct flow orientation (if specified)
Allow access for maintenance and open/close movements
Confirm if the valve is suitable for the system pressure requirement

How to Select the Right NIBCO GD-4765 Configuration

Selecting the correct NIBCO GD-4765 grooved butterfly valve is not just about matching pipe size - it requires evaluating system conditions, control requirements, and installation constraints to ensure long-term performance and reliability.

Below is a step-by-step breakdown used by engineers and procurement teams when replacing this valve:

Application Requirements: Start by identifying how the valve will be used within the system:
- HVAC systems: Typically require a reliable shut-off.
- Industrial water systems: May involve higher pressure or continuous operation.
- Fire protection systems: Must meet strict code and certification requirements.
It's important to know the application to determine:
- Required durability
- Compliance standards
- Type of actuation needed
Confirm System Pressure and Temperature Limits: The valve specs must align with the system's operating requirements. Key considerations:
- Maximum working pressure
- Operating temperature range
- Fluid type (water, glycol mix, etc.)
Important: If a valve is selected outside its rated limits, it may pose safety risks, poor performance, leakage, and premature failure.
Verify Pipe Size and Valve Dimensions: Correct sizing is critical for both performance and installation. When reviewing NIBCO butterfly valve dimensions, ensure:
- Valve size matches pipe diameter
- Groove specifications align with your coupling system
- Adequate clearance for installation and operation
- Space constraints in mechanical rooms
- Clearance for handles, gear operators, or actuators
Choose the Right Actuation Method: The GD-4765 can be configured with different actuation options depending on system requirements:
- Lever handle for smaller sizes
- Gear operator for larger valves
- Electric actuator
- Pneumatic actuator
If an external actuator is required, you must meet the system's torque, power availability, and control signal requirements.
Ensure Compliance and Project Specifications: For commercial and institutional projects, always verify:
- Project specifications
- Industry standards, such as HVAC or fire codes
- Required certifications
Failure to meet spec requirements can delay approvals and increase costs.

Frequently Asked Questions

What is the NIBCO GD-4765 used for?

The NIBCO GD-4765 is a grooved butterfly valve used for flow isolation in HVAC, industrial water, and mechanical piping systems. It is commonly specified for its easy installation and reliable performance.

What are the dimensions of the NIBCO GD-4765 butterfly valve?

NIBCO GD-4765 butterfly valve dimensions vary depending on size (typically ranging from 2” to 10”). Key measurements include face-to-face length, disc clearance, and groove specifications. Always verify dimensions against project requirements before installation.

What type of connection does the NIBCO GD-4765 use?

The NIBCO GD-4765 features grooved end connections, enabling fast installation with standard grooved couplings. This reduces labor time and simplifies maintenance or system modifications.

How do you select the right NIBCO GD-4765 valve?

To select the correct NIBCO GD-4765 valve, consider system pressure, temperature, pipe size, actuation requirements, and application type. Proper sizing and configuration are critical for performance and longevity.

NIBCO Parts And Valves Available in Liberty Supply

Check The Valve Range Available

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