GS-C25 Cast Steel Flanged Y Strainer - PN16 to PN63, DN15 to DN600, DIN and GB Standard
Tengs Valve supplies high-quality GS-C25 Cast Steel Flanged Y Strainers for DIN / GB standard service in pressure ratings PN16, PN25, PN40 and PN63 (PN64). Manufactured in GS-C25 cast steel equivalent to EN-GP-240-GH (1.0619) and A216-WCB, with bolted cover and flanged FF or RF ends to DIN EN 1092-1. Nominal diameters range from DN15 to DN600. Screens are offered in perforated plate (1mm to 5mm hole) and wire mesh (SS304, SS316), with mesh sizes from 10 to 100 mesh. Drain connection can be supplied as plug, flange or valve. Ideal for water, gas, oil and steam service in European and Chinese standard piping systems, district heating, and general industrial applications.
GS-C25 Cast Steel Flanged Y Strainer Specification
• Strainer Type: Y Type, Y Pattern
• Sizes: DN15 to DN600
• Pressure Rating: PN16, PN25, PN40, PN63 (PN64)
• Body Material: Cast Steel, GS-C25, A216-WCB
• Strainer Screen: Stainless Steel 304, 316, 316L etc.
• Perforated Hole Size: 1mm, 2mm, 3mm, 4mm, 5mm etc.
• Wire Mesh: Stainless Steel SS304, SS316
• Mesh Size: 10, 20, 40, 60, 80, 100 mesh etc.
• End Connection: Flanged FF (Flat Face), Flanged RF (Raised Face)
• Cover Type: Bolted Cover, Flanged with Blind Flange
• Drain Connection: Plug, Flange, or Valve
• Design and Manufacture: DIN, ASME
• Inspection and Test: DIN 3230, API 598
• Flange Dimension: DIN PN16, PN25, PN40, PN63 (PN64)
• Face to Face: EN 558, ASME B16.10
✓ GS-C25 cast steel Y strainer provides cost-effective filtration to DIN / GB standard for European and Chinese standard piping systems
GS-C25 Y Strainer Pressure Rating Comparison: PN16 to PN63
| Pressure Rating | Design Pressure (bar) | Design Pressure (psi) | Typical Application |
|---|---|---|---|
| PN16 | 16 | 232 | District heating, water distribution, HVAC, general industrial service |
| PN25 | 25 | 362 | Medium-pressure steam, process water, chemical service |
| PN40 | 40 | 580 | High-pressure steam, boiler feedwater, high-pressure process piping |
| PN63 (PN64) | 63 | 914 | Very high-pressure steam, high-pressure process, boiler and power plant service |
Reference: DIN EN 1092-1. PN16 is the most common rating for European water and district heating service; PN25 / PN40 / PN63 are selected for higher pressure and temperature requirements.
GS-C25 Cast Steel Material Equivalent and Selection
| DIN Grade | EN Material Number | ASTM Equivalent | GB Equivalent | Typical Application |
|---|---|---|---|---|
| GS-C25 | 1.0619 | A216-WCB | ZG230-450 | District heating, water, steam, oil and gas service |
| GS-C25N | 1.1131 | A216-WCB (normalized) | ZG230-450 | Normalized carbon steel for low-temperature service down to -29°C |
| GS-C25 / LCB | 1.6220 | A352-LCB | ZG16Mn | Low-temperature service down to -46°C |
Reference: DIN 17182, EN 10213, ASTM A216, GB/T 12229. GS-C25 is the German standard cast steel grade most widely used in PN16-PN40 flanged valves and strainers. Material certificate to EN 10204 3.1 is available on request.
GS-C25 Y Strainer Screen Selection: Perforated Plate vs Wire Mesh
| Screen Type | Opening Size | Material | Typical Application |
|---|---|---|---|
| Perforated Plate | 1mm, 2mm, 3mm, 4mm, 5mm | SS304, SS316, SS316L | Coarse filtration, high dirt load, large debris removal in district heating |
| Wire Mesh | 10, 20, 40, 60, 80, 100 mesh | SS304, SS316 | Fine filtration, pump and heat exchanger protection, instrument lines |
| Combined Screen | Perforated plate + wire mesh | SS304, SS316 | High dirt load with fine filtration requirement, common in district heating |
Reference: DIN 3230, EN 12266-1. Perforated plate is standard for large diameter and high dirt load service; wire mesh is used where finer filtration is required. Combined screens are commonly specified for district heating supply lines.
GS-C25 Cast Steel Flanged Y Strainer Main Parts and Material List
| No. | Part Name | Material |
|---|---|---|
| 01 | Body | GS-C25 (EN 1.0619), A216-WCB, EN-GP-240-GH, GB ZG230-450 |
| 02 | Screen (Perforated Plate) | SS304, SS316, SS316L |
| 03 | Screen (Wire Mesh) | SS304, SS316 |
| 04 | Gasket | Graphite + Stainless Steel (304SS, 316SS) |
| 05 | Cover | GS-C25, A105, A182-F304, A182-F316 |
| 06 | Bolt | A193 B7, A193 B8, A193 B8M, 21CrMoV5-7 (1.7709) |
| 07 | Nut | A194 2H, A194 8, A194 8M, 21CrMoV5-7 (1.7709) |
| 08 | Drain Connection | Plug, Flange, or Valve (A105, A182-F304, A182-F316) |
Reference: DIN 3230, API 598, EN 10213, GB/T 12229. Materials may vary by model and pressure rating. Contact us for confirmed material certificate to EN 10204 3.1.
GS-C25 Cast Steel Flanged Y Strainer Applications
• District heating and cooling: supply and return lines in European and Chinese district energy networks requiring DIN EN 1092-1 flanged connection.
• Water distribution: municipal water networks, pumping stations, and building services in DIN / GB standard piping systems.
• HVAC and building services: chilled water, hot water, and low-pressure steam distribution with FF or RF flanged ends.
• Steam systems (PN25 / PN40 / PN63): medium and high-pressure steam mains, boiler feedwater, and condensate lines.
• Chemical and process industry: corrosive media filtration with SS316 / SS316L screen, GS-C25 cast steel body for European and Chinese process plants.
• Power plant and boiler service: PN40 / PN63 high-pressure steam, boiler feedwater and condensate protection lines.
FAQ - GS-C25 Cast Steel Flanged Y Strainer
Q1: What is GS-C25 cast steel?
A: GS-C25 is a German standard cast steel grade defined in DIN 17182. GS stands for Gussstahl (cast steel) and C25 indicates carbon steel with a minimum tensile strength of 25 kgf/mm2 (approximately 245 MPa). It is equivalent to EN-GP-240-GH (EN 1.0619) in European standard, A216-WCB in ASTM standard, and ZG230-450 in Chinese GB standard. GS-C25 is the most widely used cast steel grade for PN16-PN40 flanged valves and strainers in European and Chinese markets.
Q2: What is the difference between perforated plate and wire mesh screens?
A: Perforated plate screens are made from a steel plate with punched holes of 1mm to 5mm, providing high mechanical strength and high dirt holding capacity. They are used for coarse filtration and large debris removal, especially in district heating return lines and large diameter pipelines. Wire mesh screens are woven from SS304 or SS316 wire with 10 to 100 mesh openings, providing finer filtration for pump and heat exchanger protection. Combined screens (perforated plate + wire mesh) are often specified for district heating supply lines where both high dirt load and fine filtration are required.
Q3: What is the difference between FF and RF flanged ends for GS-C25 Y strainers?
A: FF (Flat Face) flanged ends have a flat sealing surface and are common in low-pressure European water and district heating service, typically with a full-face gasket. RF (Raised Face) flanged ends have a raised sealing surface and are used for higher pressure PN25, PN40 and PN63 service with a confined gasket. Both flanged ends are to DIN EN 1092-1. For PN63 high-pressure steam service, RF with spiral wound gasket is the industry standard.
Q4: What is the size range and pressure rating available?
A: GS-C25 cast steel flanged Y strainers are available from DN15 to DN600 in pressure ratings PN16, PN25, PN40 and PN63 (PN64). Smaller sizes DN15 to DN50 are typically used for instrument and small pipeline protection; DN65 to DN200 are used for main pipeline protection; DN250 to DN600 are used for district heating mains, pump discharge and large diameter pipeline protection.
Q5: What is the difference between GS-C25 and A216-WCB?
A: GS-C25 and A216-WCB are equivalent cast carbon steel grades in different standards. GS-C25 is defined in DIN 17182 (German standard) with a minimum tensile strength of 245 MPa, and A216-WCB is defined in ASTM A216 (American standard) with similar chemical composition and mechanical properties. In European and Chinese projects, GS-C25 is often specified for DIN and GB standard piping systems, while A216-WCB is specified for ASME standard piping. Both grades can be supplied with mutual equivalency certificate.
Q6: How do I maintain a GS-C25 Y strainer?
A: GS-C25 Y strainer maintenance is simple: isolate the strainer, depressurize, remove the cover bolts (bolted cover design), take out the screen, clean or replace it, install a new gasket, and reassemble. The Y-shaped body allows screen removal without disconnecting the pipeline. For continuous district heating operation, a bypass line or dual-strainer configuration is recommended. Screen replacement is recommended when the pressure drop exceeds the initial clean-screen value by 0.5-1.0 bar. For PN63 high-pressure service, retorque bolts to specification after maintenance and pressure test before returning to service.
Request a Quote for GS-C25 Cast Steel Flanged Y Strainer
Send us your DN size, pressure rating (PN16 / PN25 / PN40 / PN63), body material (GS-C25 or A216-WCB), end connection (FF / RF), screen type (perforated plate or wire mesh), mesh size, and quantity. Our team will reply within 24 hours with price, drawing, and delivery time.
Email: sales@tengsvalve.com
Website: Request a Quote Online
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