Poline's Cast Steel Horizontal Lift Check Valve is a non-return valve (NRV) designed to prevent backflow in horizontal steam, air, oil, gas, and water pipelines. Unlike swing check valves, a lift check valve uses a guided, vertically-lifting disc that seats directly against flow, giving it more stable, chatter-free operation in systems with pressure fluctuations or pulsating flow — common in steam distribution and compressor discharge lines.

The valve features a straight-pattern cast steel body with a bolted cover, built to flanged end dimensions per DIN 2545 PN 40 for direct compatibility with standard PN40-rated piping. The body and bonnet are manufactured from cast steel (ASTM A216 Gr. WCB), while the disc, disc ring, and body seat ring use 13% chromium stainless steel (ASTM A276 Type 410) for wear resistance and a reliable, renewable sealing surface.

A streamlined internal flow path minimizes pressure drop across the valve, helping preserve system efficiency in continuous-duty applications. The spiral-wound gasket (SS316, graphite-filled) at the cover joint is selected for its performance under thermal cycling, making the valve well suited to high-temperature service.

Rated for:

• Shell test pressure: 6.0 MPa (60 bar)
• Maximum working pressure: 4.0 MPa (40 bar)
• Maximum working temperature: 425°C

Suitable media: Steam, air, gas, oil, and water — including compatibility with thermic fluid heater systems, common in textile processing, dyeing units, and chemical plants.

Available sizes: DN25 to DN250 (25mm–250mm).

Why this valve is specified on horizontal steam and process lines

• Lift check design gives more reliable sealing than swing checks under fluctuating flow conditions
• Renewable disc and seat ring extend service life without full valve replacement
• Bolted cover allows internal inspection and maintenance without removing the valve from the line
• Manufactured under ISO-certified processes at Poline's Surat facility

6. FAQ SECTION

Q1: What is a lift check valve, and how is it different from a swing check valve? A lift check valve uses a disc that lifts vertically off its seat when forward flow pushes it open, and drops back onto the seat when flow reverses or stops. This guided motion gives more stable sealing than a swing check valve under fluctuating or pulsating flow, which is why lift check valves are often preferred on steam and compressed air lines.

Q2: Can this valve be installed in any orientation? No. This is a horizontal lift check valve, meaning it is designed specifically for installation in horizontal pipe runs, with the disc lifting vertically. It should not be installed on a vertical pipe run — for vertical lines, a vertical lift check or swing check valve is typically the correct choice. Confirm orientation requirements with Poline before ordering for a specific line layout.

Q3: What is the maximum pressure and temperature rating? The PCS-3002 has a shell test rating of 6.0 MPa (60 bar), a maximum working pressure of 4.0 MPa (40 bar), and a maximum working temperature of 425°C.

Q4: What materials are used for the body and internal trim? The body, bonnet, and cover are cast steel (ASTM A216 Gr. WCB). The disc, disc ring, and body seat ring are 13% chromium stainless steel (ASTM A276 Type 410), chosen for wear resistance and hardness under repeated cycling. The cover gasket is spiral-wound, SS316 with graphite filling.

Q5: What end connection does this valve use? This valve has flanged ends manufactured to DIN 2545 PN 40, compatible with standard PN40-rated flange piping systems.

Q6: What sizes are available? This valve is available from DN25 (25mm) to DN250 (250mm). Refer to the technical data table on this page for face-to-face (A) and flange (B) dimensions per size.

Q7: Can this valve be used with thermic fluid systems? Yes, this valve is rated as compatible with thermic fluid applications in addition to steam, air, gas, oil, and water service.

Q8: Where is this valve manufactured? This valve is manufactured by Poline Technologies Pvt. Ltd. at its facility in Surat, Gujarat, India.