stvvalves

EPDM Seat Butterfly Valve,DI Body,CF8M Disc,Wafer Type Model;STV-D71X-PN16-DI-316-100 Our EPDM seat butterfly valve uses the flexibility of rubber seat, could easily achieve zero leakge, therefore is a widely applied valve in oilfield, agriculture, water & waste water and mining industries. Due to its rubber lined body materials, EPDM lined butterfly valve is usually used in low pressure lines. Wafer type is the common style of EPDM seat butterfly valve and is less expensive than the lug type. EPDM seat butterfly valve is installed between two flanges. The butterfly valve is kept in place by using bolts or studs and nuts from flange to flange. This type of installation, of course, makes it impossible to disconnect just one side of the piping system from the valve. STV Valve Technology Group Co., Ltd is a professional leader China EPDM resilient seat Butterfly Valves,Cast Iron Butterfly Valve,Wafer Butterfly Valves,Butterfly valves Soft seat,Lug Type Butterfly valves ,...

  Check valves, regardless of the individual design, serve the specific purpose of permitting the flow of the service medium in one direction while intentionally preventing, or at least limiting, the flow of said medium in the reverse direction. Whether an  inline check valve , wafer check valve, swing check valve or lift check valve, each version will necessarily have a dynamic element, whether disc, door, flapper, or ball, whose movement directly corresponds to the opening or closing of the subject flow path. Depending upon the specific type of check valve under consideration, gravity or spring force can play a role in keeping this dynamic element closed against the valve seat when the upstream pressure or flow in the desired direction proves insufficient to push or lift the disc, door, flapper, or ball into the open position. Since the flow of the medium in the desired direction in every check valve necessarily faces some level of resistant force, whether gravity,...

  At STV VALVE Supplies, we supply a vast range of   sight glasses . Industries such as the food and beverage, distilling and brewing utilise sight glasses throughout their whole system and rely on them to observe liquid contained within their process. In this article, we will discuss how a sight glass works and types of sight glasses available. WHAT IS A SIGHT GLASS USED FOR? A  sight glass  is a transparent tube that is used for observing the level of liquid contained within a tank or boiler. Simple sight glasses can be a plastic or glass tube connected to the bottom of the tank at one end and the top of the tank at the other. They come in various different styles, including: Tubular sight glass – This is where the sight glass acts as a transparent tube through which the operator of a tank or boiler can observe the level of liquid contained within. Circular sight glass – A circular pane of glass through which an operator can view inside a vessel. Sight flow – An in...

  There are many different   types of valves   available for different applications. With so much choice it can be difficult to decide which valve is most suitable for your application. In this article, STV Supplies explores the merits of ball valves versus globe valves. WHAT IS THE MAIN DIFFERENCE BETWEEN BALL AND GLOBE VALVES? The main difference between ball and globe valves is the way they close. Ball valves have a stem and ball, which turns horizontally, and are commonly referred to as “rotational” valves. Whereas, globe valves have a stem and plug, which strokes linearly, and gives them their other name of “stroke” valves. Ball valves are best suited to applications requiring on/off control without pressure drop. While globe valves excel at regulating flow. HOW DOES A BALL VALVE WORK? Ball valves are designed with a ball inside the valve. A ball valve is a form of quarter-turn valve which uses a hollow, perforated and pivoting ball (called a “floating ball”) to cont...