Steel Gear Box For Butterfly Valve
Basic Info
Model No.: USM-279
Product Description
A Butterfly Valve is a valve that isolates or regulates the flow of a fluid. The closing mechanism is a disk that rotates.
Operation is similar to that of a Ball Valve, which allows for quick shut off. Butterfly valves are generally favored because they cost less than other valve design, and are lighter weight so they need less support. The disc is positioned in the center of the pipe. A rod passes through the disc to an actuator on the outside of the valve. Rotating the actuator turns the disc either parallel or perpendicular to the flow. Unlike a ball valve, the disc is always present within the flow, so it induces a pressure drop, even when open.
A butterfly valve is from a family of valves called quarter-turn valves. In operation, the valve is fully open or closed when the disc is rotated a quarter turn. The "butterfly" is a metal disc mounted on a rod. When the valve is closed, the disc is turned so that it completely blocks off the passageway. When the valve is fully open, the disc is rotated a quarter turn so that it allows an almost unrestricted passage of the fluid. The valve may also be opened incrementally to throttle flow.
There are different kinds of butterfly valves, each adapted for different pressures and different usage. The zero-offset butterfly valve, which uses the flexibility of rubber, has the lowest pressure rating. The high-performance double offset butterfly valve, used in slightly higher-pressure systems, is offset from the centre line of the disc seat and body seal (offset one), and the centre line of the bore (offset two). This creates a cam action during operation to lift the seat out of the seal resulting in less friction than is created in the zero offset design and decreases its tendency to wear. The valve best suited for high-pressure systems is the Triple Offset Butterfly Valve. In this valve the disc seat contact axis is offset, which acts to virtually eliminate sliding contact between disc and seat. In the case of triple offset valves the seat is made of metal so that it can be machined such as to achieve a bubble tight shut-off when in contact with the disc.
Unisite information
UniSite group was established in 2008 in Ningbo - Chinese second largest port, dredging relevant products manufacturing & supplying since 2005, that is characterized by visible leadership, vitality, innovation, long-term vision and a sound financial position.
As an international partner, we are specialized in providing comprehensive service of dredging, marine engineering, municipal engineering, mechanical engineering, construction machinery, agricultural machinery, port hoisting machinery, metallurgy, automobile, chemical, marine machinery, oilfield projects.
The group has a perfect managing system and our staff who are professional in technology are committed, passionate, efficient. Thanks to the knowledge, the experience and the skills of our work team, we are able to offer our client best possible and most sustainable solutions to their requirement. We are one of the leading steel parts and service providers for dredging and marine engineering in China.
UniSite`s second core activity: serve for machinery and automobile projects
Provide service and relevant parts for mechanical engineering, construction machinery, agricultural machinery, port hoisting machinery, metallurgy, automobile, chemical, marine machinery.
Product range:
A. Big Machining(machining center, boring and milling, lathe)
B. Small Machining(cnc, milling, grinding)
C. Casting (sand, investment)
D. Die casting
E. Forging
F. Stamping and Bending
Product list:
Service Key Customers in the following fields:
- Machinery Products(like Wind Turbine Generate System Hub, Wind Power Bearing Block, Punching Machine Sliding Block, Punching Machine, diesel power generator base, die casting machine base, injection molding machine base, punch, tank, pump parts, accumulators parts, valve parts, construction parts, agricultural parts etc.)
- Machinery Products
- Auto Products
- Shipping building Products
- Medical Products
- Oil Products
Casting
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| MAIN PARTICULARS |
| Material for product | carbon steel, alloy steel, stainless steel, aluminum alloy, zinc alloy, brass, gray iron, nodular cast iron, ductile Iron or other specified |
| Standard | ASTM, ASME, DIN, JIS, ISO, BS, API, EN |
| Certificate | ISO9001, BV |
| Dimension | As per drawing, as large as we can |
| Processing | Step1:investment casting, Lost wax Casting , sand casting Step2:turning , milling, drilling, grinding, threading, CNC machining |
| Finishing surface | Machined surface with tectyl891, anodize, polishing, nickel plating, zinc plating and chrome plating, oxidation, powder coating, painting, etc. |
| Inspection | material, construction, dimension, heat treatment, hardness, NDT |
| Quality | ISO9001, BV, control production |
Photos of Steel Gear Box For Butterfly Valve
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Product Categories : Casting Parts > Carbon Steel Casting Parts