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Mcdonnell & Miller Series 63 – Low Water Cut-Offs - Low Water Cut Offs
Mcdonnell & MillerLow Water Cut Offs

Mcdonnell & Miller Series 63 – Low Water Cut-Offs

McDonnell & Miller Low Water Cut Offs.

SKU 3G-OTH-02739

Brand
Mcdonnell & Miller
Item
Series 63 – Low Water Cut-Offs
Part Number
63
Category
Low Water Cut Offs
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Mcdonnell & Miller Products
3G Electric (S) Pte. Ltd. — Singapore

Product Description

McDonnell & Miller Low Water Cut Offs.

Frequently Asked Questions

What is the McDonnell & Miller No. 63 low water cut-off used for?

The McDonnell & Miller No. 63 is a heavy-duty low water cut-off used to protect steam and hot water boilers from damage due to low water conditions. It includes a No. 2 switch and can be used with a TC-4 on hot water systems, with a maximum boiler pressure of 50 psi (3.5 kg/cm²).

What are the specifications of the McDonnell & Miller No. 63 low water cut-off?

The McDonnell & Miller No. 63 is a heavy-duty low water cut-off with a maximum boiler pressure of 50 psi (3.5 kg/cm²). It includes a No. 2 switch and offers an optional manual reset. It is designed for use with a TC-4 on hot water systems.

Where to buy the McDonnell & Miller No. 63 in Singapore?

You can source the McDonnell & Miller No. 63 low water cut-off through 3G Electric in Singapore. We handle logistics, customs clearance, and delivery to your facility. Contact us for pricing and lead time on this heavy-duty boiler safety component.

How to install the McDonnell & Miller No. 63 low water cut-off?

Install the McDonnell & Miller No. 63 according to the manufacturer's instructions, typically in the boiler water line at the recommended level. Ensure the switch is properly wired and the optional manual reset is configured if needed. For hot water systems, pair it with a TC-4 for reliable operation.

Used in

Common applications for Mcdonnell & Miller
Steam boiler low-water cutoff — McDonnell & Miller inline flow switches (e.g., FS-1) for automatic burner shutdown
Cooling water flow monitoring — McDonnell & Miller insertion-style switches (e.g., FS4-3D) in large-diameter pipes
Hazardous-area process lines — McDonnell & Miller FS7-4E with NEMA 7/9 enclosure for Class I, Div 1 locations
HVAC chilled water systems — McDonnell & Miller FS6-1 inline switch for pump flow verification
Industrial wastewater treatment — McDonnell & Miller FS4-3S stainless steel switch for corrosive fluid flow detection
Boiler feedwater control — McDonnell & Miller FS8-WJ with BSP connections for international installations
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Mcdonnell & Miller Products

3G Electric supplies Mcdonnell & Miller low water cut offs. We supply genuine products with in-stock availability on common SKUs, technical documentation, commissioning support, and warranty service — worldwide.

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