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MCDONNELL 94-HD Head Mechanism - Replacement HVACR Pumps, Valves & Tubing
MCDONNELLReplacement HVACR Pumps, Valves & Tubing

MCDONNELL 94-HD Head Mechanism

The MCDONNELL & MILLER 94-HD Head Mechanism is a replacement component for HVACR pumps, valves, and tubing. This head mechanism is compatible with manufacturer part number 94. It is designed as a direct replacement…

SKU 3G-OTH-82488

Also listed as: 94HD · 94 HD

Brand
MCDONNELL
Item
94-HD Head Mechanism
Part Number
94-HD
Category
Replacement HVACR Pumps, Valves & Tubing
Available to Order
Also known as:94-HDMCDONNELL
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Technical Specifications

MCDONNELL
Manufacturer Part Number
94-HD
Product Type
Head Mechanism
Compatible Manufacturer Part Number
94

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MCDONNELL Products
3G Electric (S) Pte. Ltd. — Singapore

Product Description

The MCDONNELL & MILLER 94-HD Head Mechanism is a replacement component for HVACR pumps, valves, and tubing. This head mechanism is compatible with manufacturer part number 94. It is designed as a direct replacement part for compatible MCDONNELL & MILLER systems.

Frequently Asked Questions

What is the MCDONNELL & MILLER 94-HD Head Mechanism used for?

The 94-HD Head Mechanism is a replacement component for HVACR pumps, valves, and tubing. It is designed as a direct replacement part for compatible MCDONNELL & MILLER systems, helping maintain proper flow control and safety in commercial heating and cooling applications.

What are the specifications of the MCDONNELL & MILLER 94-HD Head Mechanism?

The 94-HD Head Mechanism has a manufacturer part number of 94-HD and is compatible with manufacturer part number 94. It is classified as a head mechanism product type, intended as a direct replacement component for MCDONNELL & MILLER systems in HVACR applications.

Where to buy the MCDONNELL & MILLER 94-HD Head Mechanism worldwide?

3G Electric supplies the MCDONNELL & MILLER 94-HD Head Mechanism to customers worldwide. As a global industrial equipment distributor, we handle full logistics, customs clearance, and delivery to your location. Contact us for availability and lead time.

How to install the MCDONNELL & MILLER 94-HD Head Mechanism?

Installation should follow the manufacturer's guidelines for MCDONNELL & MILLER systems. Ensure the system is depressurized and isolated before replacing the head mechanism. Use compatible gaskets and torque fasteners to spec. Consult a qualified HVACR technician for proper setup and testing.

Used in

Common applications for MCDONNELL
Commercial boiler rooms — McDonnell & Miller low water cut-offs (e.g., Part 69) for steam and hot water boilers to prevent dry-fire.
Industrial steam systems — McDonnell & Miller water feeders (e.g., 51-S-HD) to maintain water level in low-pressure steam boilers.
HVAC hydronic heating — McDonnell & Miller level controls (e.g., 63-M) for monitoring liquid levels in expansion tanks and receivers.
Boiler maintenance and repair — McDonnell & Miller replacement head mechanisms (e.g., 94-HDLS) to restore function to existing controls.
Process equipment — McDonnell & Miller float blocks (e.g., 64-B) for on/off control of pumps and valves based on liquid level.
Steam boiler safety — McDonnell & Miller level control tappings (e.g., 63-B) to prevent low-water conditions in commercial and industrial systems.
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MCDONNELL Products

3G Electric supplies MCDONNELL replacement hvacr pumps, valves & tubing. We supply genuine products with in-stock availability on common SKUs, technical documentation, commissioning support, and warranty service — worldwide.

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