DN125 Concrete Pump Shut Off Valve

DN125
Shut Off Valve
Concrete Pump Pipe
Cut-Off Valve
Confirm Flange Type

DN125 Concrete Pump Shut Off Valve

The DN125 concrete pump shut off valve is installed in the concrete delivery pipeline to stop or isolate the flow of concrete. It is commonly used during maintenance, pipe changeover, blockage handling and high-rise pumping to prevent concrete backflow. This listing covers the DN125 size; the exact drive type and flange standard must be confirmed before fitting.

Key Features

Size: DN125 concrete pump delivery pipe size.
Purpose: Cut off / isolate concrete flow in the pipeline.
Drive Types Available In Market: Manual, hydraulic, electric — confirm which version this unit is.
Pipeline Use: Trailer pump, truck-mounted pump and stationery pump delivery lines.
Flange Check Required: DN125 concrete pump pipes commonly use 148 mm or 157 mm flange collars — not interchangeable.

Product Specifications

Product Name	Shut Off Valve / Cut-Off Valve
Pipe Size	DN125
Application	Concrete pump delivery pipeline
Drive Type	Not stated on source page — manual
Flange / Collar	Confirm: 148 mm (low pressure) or 157 mm (high pressure)
Pipe OD	Common 133 mm or 140 mm
Material	Typically 20# steel

How It Works

A shut-off valve sits in the pump line and blocks the concrete column when closed. In high-rise pumping it helps prevent backflow; during a blockage, the operator closes the valve, relieves pressure safely, then opens the pipe for cleaning. Manual units are operated by lever or hammer strike; hydraulic units use a cylinder and pump pack.[3,11](@ref)

Important Note

Do not order only by "DN125". Measure the old valve: flange collar diameter (148 mm vs 157 mm), pipe outer diameter, bolt hole circle, wall thickness and drive type. Wrong flange standard will not mate with your existing concrete pump pipe.[2,8](@ref)