James Duva, Inc. supplies ball valves as well as most of your piping needs. These units are durable and can be used in high pressure applications. A ball valve is a variation of a quarter-turn valve that utilizes a ball with a hole through it, which opens and closes the valve based on the direction […]
James Duva, Inc. is a reliable supplier of check valves, in addition to many of your piping & welding needs. Our products are reliable, versatile and may be used in extreme conditions. With two openings in the body (one for fluid to exit and one for it to enter), Check valves allow gas or liquid […]
A Gate stops the flow of liquid using a wedge that slides in and out of the pipe and is used as a stopper of block flow in a pipe system.
A Globe is used to block or control the flow of gas or liquid in a pipe, and is formed by a baffle that splits the interior of the pipe. The opening of the baffle is sealed by a flat plug or disc to stop the flow.
From the family of valves known as “quarter turn valves,” the Butterfly consists of a metal disc mounted on a rod. The disc turns to block the flow and is rotated a quarter turn to open the passage.
A simple valve which blocks the flow of liquid or gas through a pipe, the Plug is often shaped like a cylinder or an upside-down cone. The Plug has two holes located on opposite sides, and when it’s turned to the option position it creates a passage.
To cut through heavy liquids that have clogged, a knife gate valve uses a blade as its primary component.
A safety device made to divert pressure, a pressure Relief Valve offers an outlet to handle dangerous pressure build-up. Required by law for safety reasons in many areas, Pressure Relief Valves are very useful for a variety of industries.
With a flexible membrane to close the opening, the Diaphragm Valve utilizes the pressure decrease or increase on either side of the device to move. Diaphragm Valves are used in industries like pollution control, food processing, mining and pharmaceutical manufacturing.
Available in Switch and Isolation, a coker is used to convert residual oil into petroleum coke, low molecular weight hydrocarbon bases, light and heavy gas oils, and naptha.
Usually non-mechanical, Flow Control valves typically rely on the conditions of the regulated substance to close or open the device. Monitoring devices such as temperature gauges and pressure gauges are sometime used to regulate Flow Control valves.
Bellows sealed valves are used to reduce the leakage that creates emissions in the pipelines of chemical plants. The welded bellow and the forged bellow are the two main types of bellow sealed valves.