We ship to the Philippines — door-to-door, customs and logistics handled by 3G Electric

3G Electric
RFQ CartGet a QuoteSign inSign up
Mcdonnell & Miller Series FS4-3 General Purpose Liquid Flow Switches
Mcdonnell & MillerFlow Switches

Mcdonnell & Miller Series FS4-3 General Purpose Liquid Flow Switches

McDonnell & Miller Flow Switches.

SKU 3G-OTH-02753

Also listed as: FS43 · FS4 3

Brand
Mcdonnell & Miller
Item
Series FS4-3 General Purpose Liquid Flow Switches
Category
Flow Switches
Available to Order
Trade pricing by quote — replies within 24h
Qty
WhatsApp an engineerMessage via Telegram
No account needed — your quote request goes straight to our engineers. A free account lets you track quotes and re-order faster.
Worldwide Shipping
Air & sea freight
Datasheet on Request
Technical specs
1-Day Quote
Replies within 24h

Local availability & support — the Philippines

Delivery
5–8 business days door-to-door; Bureau of Customs clearance typically 2–4 business days.
Payment
Invoicing in PHP or USD. Bank transfer and corporate PO accepted.
Ships to
Manila, Quezon City, Cebu, Davao, Batangas

Technical Documents

No technical documents available for this product.
Request documentation →
Not sure this is the right part? Get a recommendation.

Need installation or engineering help?

Installation, commissioning, maintenance plans, system design, and bundled product + service quotes — one team handles the full scope.
Talk to an engineer

Ask a question

Mcdonnell & Miller Products
3G Electric (S) Pte. Ltd. — Singapore

Product Description

McDonnell & Miller Flow Switches.

Supplied to the Philippines — compatible with 60 Hz installations. DHL Express delivery to Manila, Quezon City, Cebu, customs and duties handled door-to-door.

Frequently Asked Questions

What is the McDonnell & Miller 3G-OTH-02753 flow switch used for?

The McDonnell & Miller 3G-OTH-02753 is a flow switch used in industrial piping systems to detect liquid flow or no-flow conditions. It is commonly applied in HVAC, boiler, and process control systems to activate alarms, pumps, or burners when flow starts or stops.

What are the specifications of the McDonnell & Miller 3G-OTH-02753?

The 3G-OTH-02753 features a 1-inch NPT connection, two electrical knock-outs for wiring from either end, and a sensitivity adjusting screw for easy flow adjustment. It has a single pole, double throw (SPDT) snap-action switch rated for general-purpose flow detection.

Where to buy the McDonnell & Miller 3G-OTH-02753 in Singapore?

You can source the McDonnell & Miller 3G-OTH-02753 flow switch through 3G Electric in Singapore. We handle logistics, customs clearance, and delivery to your facility. Contact us for pricing and lead time on this item.

How to install the McDonnell & Miller 3G-OTH-02753 flow switch?

Install the 3G-OTH-02753 in a horizontal pipe section with the flow arrow aligned to flow direction. Use the sensitivity adjusting screw to set the actuation point. Wire the SPDT switch through the knock-outs per your control circuit. Always follow local electrical codes and the manufacturer's manual.

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

Mcdonnell & Miller Products

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

You might also need

Burners & Combustion →Pumps & Compressors →Spare Parts →All Products →

Compatible alternatives & equivalents

Cross-referenced by specification & description
This Siemens 2-way flanged zone valve features a 3/4 in flanged port connection, 5.9 Cv flow rate, and 24V AC/DC actuator voltage. It operates with spring return, normally closed action, and proportional signal for modulating control. Suitable for regulating water or glycol flow in HVAC and industrial fluid control systems
Siemens
This Siemens 2-way flanged zone valve features a 3/4 in flanged port connection, 5.9 Cv flow rate, and 24V AC/DC actuator voltage. It operates with spring return, normally closed action, and proportional signal for modulating control. Suitable for regulating water or glycol flow in HVAC and industrial fluid control systems
Siemens
Siemens
2-way, spring return, normally closed zone valve with 3/4 in Union NPT connections and 24V AC/DC floating signal actuator. Used in HVAC systems for regulating fluid flow in piping networks
Siemens
Siemens
Two-way, spring return, normally closed zone valve with 1 in Union NPT connections and 24V AC floating signal actuator. Used in hydronic HVAC systems to regulate fluid flow in heating or cooling zones
Siemens
Siemens
2-way, spring return, normally closed zone valve with 1-1/4 in Union NPT connections. Operates on 24V AC floating signal. Suitable for regulating fluid flow in HVAC zone control applications
Siemens
Siemens
This Siemens magnetic valve is a 2-way, spring return, normally closed (NC) valve with a floating signal. It features a 2 in Union NPT port connection and operates on 20 to 30V DC actuator voltage. Suitable for on/off or floating control in HVAC and industrial fluid systems, it provides fail-safe operation upon power loss
Siemens
Siemens
2-way flanged zone valve with spring return and normally closed operation. Features a 1 in flanged port connection and 24V AC/DC actuator voltage. Proportional signal control for modulating flow in HVAC and industrial fluid systems

More from McDonnell & Miller

View all McDonnell & Miller parts →
In-line configuration eliminates need for a pipe tee Very high flow capacity Actuates at extremely low flow rate Sizes available 3 4 NPT 1
McDonnell & Miller
In-line configuration eliminates need for a pipe tee Very high flow capacity Actuates at extremely low flow rate Sizes available 3 4 NPT 1
In-line configuration eliminates need for a pipe tee Very high flow capacity Actuates at extremely low flow rate Sizes available 3 4 NPT 1
McDonnell & Miller
In-line configuration eliminates need for a pipe tee Very high flow capacity Actuates at extremely low flow rate Sizes available 3 4 NPT 1
1 1 4 NPT Brass with sealed tube construction Single pole, double throw snap switch Magnetic switching mechanism eliminates need for
McDonnell & Miller
1 1 4 NPT Brass with sealed tube construction Single pole, double throw snap switch Magnetic switching mechanism eliminates need for
Sealed Monel bellows Single pole, double throw snap switch Four stainless steel paddles included 1, 2, 3 and 6 (25, 50, 80
McDonnell & Miller
Sealed Monel bellows Single pole, double throw snap switch Four stainless steel paddles included 1, 2, 3 and 6 (25, 50, 80
1 NPT Connection Two electrical knock-outs allows connection from either end Sensitivity adjusting screw makes flow adjustment easy Single pole, double
McDonnell & Miller
1 NPT Connection Two electrical knock-outs allows connection from either end Sensitivity adjusting screw makes flow adjustment easy Single pole, double
For general purpose low velocity applications where the most economical flow switch is desired Paddle fits 8 (203mm) minimum duct size Two electrical
McDonnell & Miller
For general purpose low velocity applications where the most economical flow switch is desired Paddle fits 8 (203mm) minimum duct size Two electrical
For industrial hazardous environment applications requiring a NEMA 7 (Class I, Division I, Group C and D) or NEMA 9 (Class II, Division I, Group E, F, and G)
McDonnell & Miller
For industrial hazardous environment applications requiring a NEMA 7 (Class I, Division I, Group C and D) or NEMA 9 (Class II, Division I, Group E, F, and G)
In-line configuration eliminates need for a pipe tee Sizes available 3 4 NPT 1 NPT Materials of construction Brass, carbon EPDM elastomer
McDonnell & Miller
In-line configuration eliminates need for a pipe tee Sizes available 3 4 NPT 1 NPT Materials of construction Brass, carbon EPDM elastomer