1-1/2″-800LB Y-Pattern Piston Lift Check Valve
Description
Y-Pattern Piston Lift Check Valve – Technical Data Sheet
1. Product Overview
This technical data sheet covers the Y-Pattern Piston Lift Check Valve, a high-performance valve designed to prevent backflow of medium. Its Y-type configuration optimizes the flow path, minimizes pressure drop, and facilitates in-line maintenance. Manufactured using the die forged process, it ensures extreme strength and reliability for the valve body and bonnet. The F316L stainless steel material provides excellent corrosion resistance, making it suitable for severe industrial applications.
2. Key Technical Parameters
| Parameter Name | Technical Specification | Remarks |
|---|---|---|
| Valve Type | Y-Pattern Piston Lift Check Valve | |
| Design Standard | API 602 (Forged Steel Gate, Globe and Check Valves for Sizes NPS 4 and Smaller) | |
| Structure Type | Piston Lift | |
| End Connection | Socket Weld (SW) / Threaded (NPT) / Butt Weld (BW) | As per customer requirement |
| Nominal Size | NPS 1/2″ ~ 2″ (DN 15 ~ 50) | Common size range, larger sizes may require customization |
| Nominal Pressure | Class 800 LB | Conforms to ASME B16.34 Pressure-Temperature Ratings |
| Body Material | ASTM A182 F316L (UNS S31603) | Forged stainless steel, low carbon ‘L’ grade, excellent corrosion resistance |
| Bonnet Material | ASTM A182 F316L (UNS S31603) | Same as body material for consistency |
| Disc/Piston Material | ASTM A182 F316L (UNS S31603) | Piston type disc, precision machined |
| Seat Material | ASTM A182 F316L (UNS S31603) + Hard Facing / Stellite Overlay | Integral seat with body, seating surface optional Stellite 6# overlay |
| Sealing Gasket Material | Graphite / PTFE | Bonnet gasket and other sealing components |
| Manufacturing Process | Die Forged | Both body and bonnet are die forged, ensuring dense structure and superior mechanical properties |
| Inspection & Testing | API 598 (Valve Inspection and Testing) | Shell test, low pressure seat test, and high pressure seat test as per API 598 |
| Fire Safe | Optional API 607 / ISO 10497 Fire Test Certified | Available upon customer request |
| Marking | MSS SP-25 | Body marking conforms to MSS SP-25 standard |
| Pressure-Temperature Rating | ASME B16.34 | Conforms to ASME B16.34 specified pressure-temperature ratings |
| Surface Treatment | Standard industrial coating / Pickling & Passivation (for Stainless Steel) | As per customer requirement |
| Medium | Water, Steam, Oil, Gas, Chemicals, etc. | Material suitability needs to be verified based on specific medium and temperature |
| Applicable Temperature | -29℃ ~ 538℃ (Specific range limited by ASME B16.34 and gasket material) | |
| Installation Direction | Recommended horizontal or upward inclined installation (medium flow direction as per body arrow) | Y-pattern allows for vertical upward flow applications in certain cases |
3. Design Features
- Y-Pattern Structure: Optimized flow channel, resulting in lower pressure drop and significantly reduced fluid resistance compared to conventional straight-through check valves.
- Die Forged Body and Bonnet: Utilizes advanced die forging process to ensure superior material density, high strength, and toughness for the valve, eliminating potential defects found in castings and enhancing valve safety and service life.
- F316L Stainless Steel Material: Provides excellent corrosion resistance, especially good resistance to chloride stress corrosion, suitable for various corrosive medium environments. The low-carbon ‘L’ grade helps to minimize intergranular corrosion after welding.
- Piston Lift Disc: The piston design allows the disc to lift and seat smoothly under fluid propulsion, reducing impact and wear, thereby extending the service life of the sealing surfaces.
- Hardened / Overlay Sealing Surfaces: The seat sealing surface can be optionally hard-faced or overlaid with Stellite 6# alloy, significantly increasing the hardness, wear resistance, and erosion resistance of the sealing surfaces for long-term reliable sealing.
- Easy Maintenance: The Y-pattern structure allows for convenient bonnet removal and easier inspection or replacement of the disc, reducing maintenance costs and downtime.
- API 602 Standard: Strictly designed, manufactured, and tested in accordance with API 602 standards, ensuring the product meets international industrial valve requirements for high quality and reliability.
- Class 800 LB: Suitable for high-pressure conditions, meeting stringent process demands.
4. Dimensions & Weights (Example, refer to manufacturer’s drawings for actual dimensions)
| Nominal Size (NPS) | End Connection (SW/NPT) | A (End-to-End Dimension, mm) | H (Bonnet Height, mm) | Weight (Kg, Approx.) |
|---|---|---|---|---|
| 1/2″ | SW: ASME B16.11 / NPT: ASME B1.20.1 | 70 | 85 | 1.5 |
| 3/4″ | SW: ASME B16.11 / NPT: ASME B1.20.1 | 80 | 95 | 2.0 |
| 1″ | SW: ASME B16.11 / NPT: ASME B1.20.1 | 90 | 110 | 3.0 |
| 1 1/2″ | SW: ASME B16.11 / NPT: ASME B1.20.1 | 110 | 135 | 5.5 |
| 2″ | SW: ASME B16.11 / NPT: ASME B1.20.1 | 130 | 160 | 9.0 |
Note: The above dimensions and weights are typical values and for reference only. Actual product dimensions may vary slightly due to manufacturer design. Please refer to the final confirmed drawings.
5. Ordering Information
When placing an order, please provide the following information:
- Valve Type (Y-Pattern Piston Lift Check Valve)
- Nominal Size (NPS)
- Nominal Pressure (Class)
- End Connection Type (Socket Weld SW / Threaded NPT / Butt Weld BW)
- Body Material (F316L)
- Seating Surface Material (e.g., F316L+Stellite 6#)
- Medium Name, Working Temperature, and Working Pressure
- Requirement for Fire Safe certification (API 607)
- Any other special requirements (e.g., surface treatment, inspection report requirements)
Disclaimer:
The information provided in this technical data sheet is for reference only. Due to continuous product improvement and design changes, the content of this document may be subject to change without prior notice. Please confirm the latest technical data and drawings with the manufacturer before placing an order.
