An A352 LCB renewable seat ring Gate Valve with flexible wedge is a high-performance industrial valve designed for reliable service in low-temperature environments. The A352 LCB designation refers to a low-temperature carbon steel body casting, suitable for applications down to -46°C (-50°F) . Its flexible wedge design allows the disc to flex under thermal expansion or pressure fluctuations, ensuring a tight seal even in demanding conditions . The renewable seat rings are a key maintenance feature, enabling in-situ replacement of the seating surfaces without removing the entire valve body from the pipeline, which significantly reduces downtime . Manufactured under API 600 standards, these gate valves are commonly used in petrochemical, refinery, and power generation applications
Technical Attributes & Specifications
1. **Body Material:** ASTM A352 Grade LCB (Low-temp Cast Carbon Steel).
2. **Wedge Type:** Flexible Wedge (provides superior sealing under thermal stress).
3. **Seat Design:** Renewable Seat Rings (Threaded or Seal-welded).
4. **Pressure Class:** Typically Class 150, 300, or 600 (ASME B16.34).
5. **Service Temperature:** Rated for performance down to **-46°C**.
6. **Design Standard:** API 600 or ASME B16.34.
7. **Connection Type:** Flanged (Raised Face) or Butt-Weld (BW).
8. **Face-to-Face:** Compliant with ASME B16.10 standards.
9. **Trim Material:** Standard API Trim #8 (SS410 + Stellite) or Trim #5.
10. **Stem Type:** Outside Screw and Yoke (OS&Y) with rising stem.
11. **Bonnet Type:** Bolted Bonnet with high-integrity spiral wound gasket.
12. **Stem Packing:** Flexible graphite with braided carbon fiber anti-extrusion rings.
13. **Flow Path:** Full-bore design for maximum flow and pigging capability.
14. **Operation:** Manual handwheel, gear operator, or electric actuator.
15. **Impact Testing:** Mandatory Charpy V-Notch testing per ASTM A352.
16. **Backseat Feature:** Integral backseat allows for packing maintenance under pressure.
17. **Sealing Surface:** Hard-faced (Stellite) for enhanced wear and erosion resistance.
18. **Testing Standards:** Hydrostatic and pneumatic testing per API 598.
19. **Anti-Corrosion:** Exterior coated with low-temp resistant epoxy primer and finish.
20. **Applications:** Cold-climate refineries, LPG storage, and feedwater systems.
Contact: Jorge Yang
Phone: +86-13588258503
E-mail: sales@fluvalve.com
Whatsapp:+86-13588258503
Add: Room 331, South Building,Building 1, No.3 Jinpeng Street, Sandun Town, Xihu District, Hangzhou City, Zhejiang Province
