Valve & Pump

Technical Drawing Design Characteristics & Material Selection Released by American Water Works Association, AWWA C509 is the standard for resilient-seated gate valves for water supply service. The terminology “resilient-seated” is sometimes also expressed as “resilient wedge”. It indicates that the wedge of the gate valve, which has plain one-piece hollow construction, shall be encapsulated/ coated with a layer of rubbers …

Metal seated cast iron gate valves (American standard) may be made of gray iron or ductile iron in accordance with MSS SP 70 and MSS SP 128, respectively. The gray iron shall be in accordance with ASTM A126, while the ductile iron shall be in accordance with ASTM A395 or ASTM A536. They are generally used for various non-shock applications …

Technical Drawings, Design Features & Materials Design features of MSS SP 128 ductile iron gate valves: RF flanged end connection; solid wedge (one-piece); OS&Y rising stem or non-rising stem; bolted bonnet; handwheel operated; metal seated (copper alloy seating surfaces); Class 125 and Class 250 gate valve bodies and bonnets shall be either ASTM A536 or ASTM A395 ductile iron and …

Technical Drawings, Design Characteristics & Materials Cast iron gate valves designed in accordance with MSS SP 70 shall be furnished with ASTM A126 Grade B gray iron bodies and bonnets. Two classes are available: Class 125 and Class 250. We supply Class 125 in both rising stem and non-rising stem styles; Class 250 is only available in rising-stem style. Although …

Functions & Applications The cast iron gate valve, furnished with cast gray iron or ductile iron body and bonnet, is a linear-motion manual valve that uses a typically flat closure element perpendicular to the process flow, which slides into the flow stream to provide shutoff. It is designed primarily for on-off services as a block valve, where the valve is …

What is the butterfly valve? Butterfly valves are valves in which the disc rorates around the valve stem to open and close. They use the disc as the closure element, the rotation angle is between 0° and 90°. The butterfly valve reaches maximum opening when disc is rotated to 90°. Butterfly valve is often used in the furnace, gas, natural …

What is the globe valve? Globe valves are valves in which the shut-off piece moves along the center line of the seat. Globe valve is the most widely used type of valve, this type of valve is very suitable for cutting or adjusting and throttling, but also suitable for medium and low pressure. Design Standards & Scope of Application Globe …

What is the gate valve? Gate valve is a linear-motion valve characterized by a body with a longer face-to-face that acommodates flow passages sufficiently long enough to ensure smooth flow through the valve without any sharp turns. Gate valve with the gate as opening and closing parts, the movement direction of the gate is perpendicular to the flow direction, gate …

What is the ball valve? Ball valve is a kind of plug valve with a ball-shaped closure element. It can control the flow through it by using a hollow,  perforated and pivoting ball. It is open when the ball’s hole is in line with the flow and closed when it is pivoted 90-degrees by the valve handle. The handle lies …

What is a valve? By definition, a valve is a device that controls the flow of a fluid. To be specific, it is a mechanical device designed to direct, start, stop, mix, or regulate the flow, pressure, or temperature of a process fluid. The “fluid” handled by a valve may be air, water, vapor, corrosive chemicals, slurry, oil, gas, liquid …