QRC Valves

Menu
REQUEST A QUOTE

DSI VALVES

DSI VALVES

Cast Steel Gate, Globe, and Check Valves

CAST STEEL PERFORMANCE FOR DEMANDING SERVICE

DSI Valves Built for Precision and Durability

For years, Forum’s DSI® cast steel valves have reliably served petroleum refineries, chemical plants, and power generation facilities across the globe. Today, these valves continue to prove their worth in the toughest processing environments.
DSI’s standard cast steel gate, globe, and check valves are built for precision and durability. Each valve is designed and manufactured to keep fugitive emissions under 100 ppm, as verified by accepted engineering practices. Therefore, they are ideal for industries where safety and environmental compliance matter.
Moreover, DSI valves come in a wide range of multi‑turn configurations, including options in stainless steel, carbon steel, and many special alloys. As a result, they can handle even the most challenging fluid compositions and high‑pressure, high‑temperature conditions. At QRC, we supply DSI cast and forged gate, globe, and check valves that meet or exceed national piping standards. Therefore, you can be confident that every valve you select delivers top‑tier performance and reliability for your application.

Cast Steel Reliability

Heavy-duty WCB and LCC cast steel construction engineered for demanding industrial service.

Low Fugitive Emissions

API 624 compliant designs that minimize fugitive emissions across long-term service cycles.

Multi-Turn Configurations

Bolted bonnet, multi-turn designs available across gate, globe, and check valve configurations.

Built for Harsh Environments

Trusted across refineries, chemical plants, and power generation facilities worldwide.

Product Categories

Select a Valve Type

Bi-Directional Tight Shutoff

DSI Gate Valves

Our cast steel gate valves work best for bi‑directional flow and tight shutoff. Thanks to the wedge‑to‑seat design, these valves operate reliably when fully open or fully closed. However, throttling with a partially open gate valve can cause concentrated flow across the seats, which may lead to damage. For this reason, gate valves are ideal in applications where a low pressure drop is a priority and flow needs to be fully stopped or opened.

DSI Gate Valves Specifications

Size Range

2″ to 54″

ASME Class

150 to 1500

Design Standard

API 600, API 624

Materials

WCB and LCC

Best Use

Isolation service

Testing

API 598
*Additional sizes, pressure classes, and materials available upon request.
DSI Gate Valve

Precise Flow Control

DSI Globe Valves

On the other hand, our cast steel globe valves are built for precise, controlled flow. They provide repeatable and consistent flow characteristics, thus making them ideal for applications that require accurate flow regulation. Their design allows for easy and smooth adjustment at different positions, making them a preferred choice in general flow control.

DSI Globe Valves Specifications

Size Range

2″ to 24″

ASME Class

150 to 1500

Design Standard

API 623, API 624

Materials

WCB and LCC

Best Use

Throttling and regulation

Testing

API 598

*Additional sizes, pressure classes, and materials available upon request.
DSI Valve

Backflow Prevention

DSI Check Valves

Meanwhile, DSI cast steel check valves excel in low‑velocity environments. They minimize restriction and reliably prevent backflow in both horizontal and vertical installations. The tilting disc design ensures a quick and secure closure, thus reducing the risk of slamming. As a result, DSI’s range of gate, globe, and check valves delivers durability, precision, and long‑term reliability across a variety of industries and flow conditions.

DSI Check Valves Specifications

Size Range

2″ to 36″

ASME Class

150 to 1500

Design Standard

API 594

Materials

WCB and LCC

Best Use

Backflow prevention

Testing

API 598

*Additional sizes, pressure classes, and materials available upon request.

DSI CATALOGS

DSI Cast Steel Valve Catalog

Cast Steel Carbon and Stainless Gate, Globe & Check

Download PDF
DSI Pressure Seal Valve Catalog

Pressure Seal Cast Gate, Globe, and Check

Download PDF
DSI Forged Steel Valve Catalog

Forged Steel Carbon, SS, & Alloy Gate, Globe & Check

Download PDF
Scroll to Top