The main purpose of the DUAL PLATE WAFER CHECK valve is to perform the work of almost any conventional valve. However, being smaller makes it lighter and, therefore, is more cost efficient to purchase, install and maintain. It is also a silent check valve; because of it’s innovative design, it does not slam upon closing. The DUAL PLATE WAFER CHECK plate design and flat seat offer many advantages. The flat seat eliminates any possibility of board snaps in the seat, which snaps occur frequently in other valves. When suspended in a vertical pin, the two plates have a reduced weight which eliminates excessive wear on the plate lugs. This wear can cause the plate to collapse on the seat’s open surface, causing the valve to subsequently fail. An important feature of the DUAL PLATE WAFER CHECK valve is that it does not depend on the pressure or flow to center the plates in relation to the sealing surface in order to make the seal. Single plate conventional designs, even those having centering guides, require a backpressure and backflow to center the plate to the seat in order to get a non leakage adjustment. This feature becomes extremely risky in the event of reduced flow and the handling of gases at low pressure. Size Pressure by class according to ASME/ANSI B16.34 Ends 2″ a 60”
150, 300, 600, 900, 1500, 2500 RF, RTJ, P
DUAL PLATE WAFER CHECK VALVE LUG TYPE Advantages of Design With the aid of spring DUAL PLATE WAFER CHECK valve LUG type, as Wafer type, gives a maximum resistance with the minimum opening time. The stop pin avoids the over travel of a disc. This design is also hermetic, which means there are no drillings in the body, and because there are now pins in a support that is attached to the body, the chance of leakage is greatly reduced. The DUAL PLATE WAFER CHECK valve LUG type covers the bolt along the entire length of the body. LUG type valves are supplied in scallop to keep the weight as low as possible, thereby minimizing the cost. LUG type valves are supplied with straight-through bores according to API-594.
They provide a quick closing response and are particularly suited for pulsating flows with compressible fluids. Wafer Type Check Valve has short face-to-face dimensions and low weight allows a simple space saving installation between the companion flanges. The Single Disc Check Valve (Wafer Type Disc Check Valve) consists of four main components: the body, a disc, a star guide and a spring. The Disc check valves are opened by the pressure of fluid and closed through compression spring as soon as flow stops thus preventing reverse flow. The design of Wafer Design, Sandwich Type Single Disc Spring ..
Wafer check valves are those that are designed to fit between a set of flanges. This broad definition covers a variety of different designs, including disc check valves and wafer versions of swing or split disc check valves..