Check Valves
Reliable Solutions for Precision Flow Control

Investment Casting Check Valves

Investment casting check valves are used in pipelines where flow should move in one direction only. The valve opens with forward flow and closes on its own when pressure drops or flow starts to reverse. As a result, water, steam, oil, gas, acid, and alkali media are less likely to flow back toward pumps or connected piping
ANSI Flanged Swing Check Valve (316 SS Check Valve)
ANSI Flanged Swing Check Valve (316 SS Check Valve)
  • Nominal Diameter: 1/2"-24"
  • Materials: 316, CF8M, 1.4408, WCB, 304, CF8, etc.
  • Pressure Rating: 150Lb
  • Inspection & Testing: API 598
  • Surface Treatment: Pickling, Passivation, Polishing (or as per customer request)
Lift Check Valve (Cast Steel Non-Return Valve)
Lift Check Valve (Cast Steel Non-Return Valve)
  • Nominal Diameter: DN15-DN200
  • Materials: 316, CF8M, 1.4408, WCB, 304, CF8, etc.
  • Design & Manufacture: GB/T 12236
  • Face-to-Face: GB/T 12221
  • Flange End: JB/T79
  • Inspection & Testing: JB/T9092
Vertical Lift Check Valve (Cast Carbon Steel Non-Return Valve)
Vertical Lift Check Valve (Cast Carbon Steel Non-Return Valve)
  • Nominal Diameter: DN32-DN200
  • Materials: 316, CF8M, 1.4408, WCB, 304, CF8, etc.
  • Design & Manufacture: GB/T 12236
  • Face-to-Face: GB/T 12221
  • Flange End: JB/T79
  • Inspection & Testing: JB/T9092
Wafer Check Valve (Cast Steel Non-Return Valve)
Wafer Check Valve (Cast Steel Non-Return Valve)
  • Nominal Diameter: 1/2"-10"
  • Materials: 316, CF8M, 1.4408, WCB, 304, CF8, etc.
  • Design & Manufacture: GB/T 12236
  • Face-to-Face: GB/T 12221
  • Flange End: JB/T79
  • Inspection & Testing: JB/T9092
Flanged Swing Check Valve (GB Non-Return Valve)
Flanged Swing Check Valve (GB Non-Return Valve)
  • Nominal Diameter: DN15-DN500
  • Materials: 316, CF8M, 1.4408, WCB, 304, CF8, etc.
  • Design & Manufacture: GB/T 12236
  • Face-to-Face: GB/T 12221
  • Flange End: JB/T79
  • Inspection & Testing: JB/T9092
Investment Casting & Valve Manufacturing Since 1987

At SDPLDL, we are a trusted manufacturer specializing in precision investment casting and industrial valves for global markets. We operate our own manufacturing facility featuring over 200 sets of advanced manufacturing equipment and an in-house testing center equipped with 16-ton dynamic balancing machines. Our integrated manufacturing capabilities allow us to seamlessly produce precision investment casting valves, custom stainless steel large-diameter valves, and slurry valves under strict compliance with ISO 9001 standards.