custom printed butterfly valve casting

Product Details


Butterfly valve - consists of a valve housing and a valve body. A valve having a rotatable disc shape or a double plate shape, a valve for intercepting the water flow, the rotation axis thereof being perpendicular to the water flow direction, and the valve closing when the valve body plane is in a state perpendicular to the water flow direction.



Investment Casting, lost wax casting, precision casting, Silicon sol casting,


Stainless Steel, Carbon Steel, Aluminum, brass, iron, ductile iron

Material Grade



0.01 kg~150kg


Class CT4~CT9

Surface Roughness

UpTo Ra1.6~Ra6.3

Applied Software

proe, catia, ug, solidworks, cad, pdf, etc

Production Capacity

More Than 100T Per Month

Heat Treatment

Anneal,Quenching,Normalizing,Carburizing,Polishing,Plating, Painting,etc

Machining Equipment

CNC Center , CNC Machines, Turning Machines,Drilling Machines , Milling Machines, Grinding Machines,etc

Measuring Tool

CMM , Projector, Vernier Caliper, Depth Caliper, Micrometer,Pin Gauge, Thread Gauge , Height Gauge,etc

QC System

100% Inspection Before Shipment


100% Report with shipment


Air or Sea

Main component

1) Valve body: The function is a part of the water passage, through which the water flows, supports the weight of the valve, withstands the operating force and torque, and transmits the water pressure.

2) Valve: The function is to cut off the water flow when it is closed, and it requires sufficient strength. When it is opened, the hydraulic loss is small in the center of the water flow, and it has good hydraulic characteristics.

3) Shaft and bearing: support the weight of the valve.

4) Locking ingot: The valve of the butterfly valve needs to lock the ingot when it is fully closed or fully open.

5) Bypass valve and bypass pipe: reduce the torque when the main valve is opened, and eliminate the vibration under the moving water.

6) Air valve: When closing, the air is supplied to the butterfly valve to prevent the steel pipe from being damaged due to the vacuum generated. When the front valve is opened, the water is exhausted when the water is filled. The valve has a hollow float suspended below the pilot piston and the hollow float is on the surface of the volute or tube. In addition, the vents are open to the atmosphere to vent or vent the volute and piping. When the pipe and the volute are filled with water, the pontoon floats to the limit position, and the volute and the pipe are isolated from the atmosphere to prevent the water from overflowing.

7) Expansion joint: easy to install and overhaul, the steel pipe has room for expansion and contraction when the temperature changes.

8) Sealing device: Prevent water leakage between the living body and the valve. The rubber band is mounted on the valve body or the flap. When the shutter is closed, the compressed air is rushed into the shroud, and the shroud expands to seal the gap of the circumference. Before the valve is opened, it should be vented and the belt retracted before the valve can be opened. The compressed air pressure in the shroud should be greater than the highest head (excluding the water hammer boost value) (2-4)*10^5Pa. When not in air pressure or water pressure, the gap between the shroud and the shutter is 0.5-1mm.