Ram Valves | Bottom Outlet & Drain Valves

From Polymers to Slurries—A Valve Line Built for Every Application.

Ram valves are widely used in process industries where reliable vessel drainage and efficient product discharge are essential. They perform well in applications involving slurries, polymers, high-viscosity materials, and other media prone to buildup while supporting consistent process performance.

Strahman offers a diverse line of ram-type valves, also called bottom-outlet and drain valves, ideal for use in liquid and gas service, as well as with slurries, polymers, and high-viscosity fluids that may solidify. Our drain ram valves come in four broad types: Soft Seal Piston (DV & VL series), Metal & Dual-Seated Piston (VP series), Rising Disc (VR series), and Lowering Disc (VD series).

Strahman ram-type drain valves are dead-space-free reactor outlet valves. Our ram valves offer two key advantages over other types of drain valves. The piston can extend to break the process crust, and then retract completely, providing unrestricted flow. In combination with our maximized port sizes, this design offers supreme drainage flow capacity. 

Soft Seal Piston Valves

Soft seal piston valves are commonly used in reactor vessels and other process equipment handling high-viscosity materials, polymers, slurries, and similar media requiring dependable drainage.

The DV series is our standard offering and is offered in 4 different seats to handle a wide array of temperatures from -328º F (-200º C) to 1000º F (-538º C). The series is offered in 1” through 8” and various flange classes and standards. 

The VL series is our custom-made series offered in a broader range of materials and designs, including carbon steel, stainless steel, titanium, Hastelloy, duplex, monel, tantalum, and zirconium. Depending on the material, these can be fabricated, cast, forged, or bar stock designs. It is also offered as a seal-less design to maximize potential applications.

Metal and Dual Seated Piston Valves

Metal & dual-seated piston valves are well suited for higher-pressure, vacuum, and elevated-temperature applications where enhanced sealing performance is required.

The VP series is the same technology as our soft seal piston valves, but with the added features of a high sealing, Dual Seal is well-suited for medium pressures and vacuum conditions. The metal-seated version of this series is for higher temperatures and pressures.

Disc Valves

Disc valves are ideal for applications requiring full-flow vessel drainage and unrestricted product discharge while maintaining reliable performance in demanding process environments.

The VD Series valve is a Full Flow Bottom Outlet Valve. As with our other series, the valve is available with a wide choice of options such as metallurgy, seat arrangements, sealing systems to atmosphere and actuators. Other available features are full jacketing, vacuum package, and dead-space-free connections to vessels.

Ram Valve Applications

Strahman ram valves support a wide range of applications across chemical and petrochemical processing, polymer manufacturing, food and beverage production, pulp and paper, and general manufacturing. Strahman delivers precision-engineered ram valves designed to meet demanding process requirements.

Rising Disc Valves

The VR Series is a Crust Breaking Bottom Outlet Valve, designed for breaking harder and tougher crusts that our other series might not be able to handle efficiently. A variety of options are available.