Valves & Pumps

Design Features At Metalsin, we supply ductile iron pump control valves (also known as “slow-shut control valve”) to waterworks applications. The pump control valve is a diaphragm‑type, hydraulically driven valve mounted at the pump outlet. It taps the pipeline’s own pressure as its power source to coordinate perfectly with the centrifugal pump’s characteristic curve. On start‑up, it delays opening gently—allowing …

At Metalsin, we supply the AWWA C515 non-rising stem (NRS) gate valve with a top mounting flange, that allow for the secure attachment of either a post indicator or an adjustable extended stem assembly. These valves are widely used in underground water supply and fire protection services. Top Mounting Flange The top mounting flange offers robust, precise alignment for post …

General Introduction A post indicator is a modified variant of extended stem device used primarily in fire protection systems to provide a visual indication of whether a buried or otherwise inaccessible valve (typically a non-rising stem gate valve) is in the open or closed position. It also serves as a means to operate the valve remotely from above ground, often …

Applications, Advantages & Design Features A gate valve with an extended stem for underground water service is a specialized valve designed for buried applications, such as municipal water supply, fire protection, or irrigation systems. Its extended (often telescopic) stem allows the operator to access and operate the valve from above ground, despite the valve being installed underground. These underground gate …

Ductile iron Y strainers with grooved ends deliver a robust and flexible solution for fire protection and waterworks piping systems by using precisely machined grooves that meet AWWA C606 and ISO 6182 standards, enabling swift and secure coupling with industry-standard fittings. Grooved end connections provide a faster, more reliable alternative to flanged connections by eliminating the need for heavy bolting …

At Metalsin, we supply ductile iron Y strainers with flanged ends for waterworks and fire protection systems. The Y-pattern strainer, often simply called the Y strainer, is a vital filtration device used in piping systems to protect equipment by removing impurities from fluid streams. Its unique Y-shaped design is engineered to create an efficient separation of contaminants from the fluid. …

Design Features The single chamber (SC) pilot-operated pressure reducing valve is a hydraulic control valve that reduces higher upstream pressure to lower downstream pressure regardless of downstream flow fluctuation or variations in upstream pressure. These control valves are widely used in water distribution and fire protection systems featuring: Single-Chamber Design: The single chamber control valve has only one control chamber …

At Metalsin, we supply ductile iron NRS gate valves with a stem cap for waterworks. These valves installed in underground pipelines primarily carrying water intended for human consumption are required to be fitted with a stem cap to enable them to be operated by a ring-key and bar or T-shaped key. These key-operated stem cap gate valves may be designed …

At Metalsin, we supply BS 5163 Type A and Type B ductile iron flanged gate valves with non-rising stems (inside screw stems) and resilient seats, complying with EN 1074-1 and EN 1074-2. These gate valves are predominantly key-operated, for underground use for waterworks purposes and primarily for use with potable water. The range of valve sizes covered is DN 50 …

Design Features At Metalsin, we supply DIN 3352 F5 ductile iron non-rising stem (NRS) gate valves, which are furnished with resilient seat and flanged ends. DINF 3352 F5 denotes that the face-to-face dimensions are in accordance with Series F5 of DIN 3202-1, which is equivalent to Series 15 of EN 558-1. Both exterior and interior surfaces of the valves are …

Design Features At Metalsin, we supply DIN 3352 F4 ductile iron resilient seated non-rising stem (NRS) gate valves for waterworks. These valves feature: DIN 3352 F4: These gate valves are designed and manufactured in compliance with German standard DIN 3352. The face-to-face dimensions shall be made in accordance with series F4 of DIN 3202-1, which is equivalent to series 14 …

Design Features At Metalsin, we supply the DIN 3352 F4 ductile iron flanged gate valves for waterworks applications. These valves have the following design features: DIN 3352: It is a German standard established by the Deutsches Institut für Normung (DIN) that specifies the design, dimensions, materials, and performance requirements for resilient seated (wedge) gate valves. These valves are engineered to …