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Help CenterJIS B2031 Non-rising Gate Valve With Brass Wedge Ring and Graphite Gasket for Vessels
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Chengxin Valve's JIS B2031 Non-rising Gate Valve features a precision-engineered brass wedge ring and graphite gasket system, delivering exceptional sealing performance for marine vessel applications. Designed to withstand harsh seawater environments, this valve ensures zero leakage during critical fluid control operations. Its compact non-rising stem design saves valuable installation space while maintaining full-bore flow capacity.
Manufactured under strict ISO9001 quality standards, each valve undergoes three-stage pressure testing to guarantee reliability in high-pressure systems up to 20K rating. The corrosion-resistant brass components extend service life by 40% compared to standard alloys according to accelerated salt spray tests.
| Model Variant | Pressure Rating | Max Temperature | Hydro Test Pressure |
|---|---|---|---|
| JGV-10K | 10K | 150°C | 15 MPa |
| JGV-16K | 16K | 180°C | 24 MPa |
| JGV-20K | 20K | 200°C | 30 MPa |
Key technical advantages include:
- Bi-directional sealing - Maintains integrity regardless of flow direction
- Low torque operation - Requires 30% less force than conventional gate valves
- Maintenance-friendly design - Replaceable gland packing without system shutdown
- Fire-safe construction
The valve's wedge ring utilizes specialized brass alloy CX-7B containing nickel and tin additives that enhance resistance to dezincification in marine environments. Combined with self-lubricating graphite gaskets, this configuration achieves:
- Cycle life exceeding 10,000 operations
- Bubble-tight shutoff per MSS SP-61 standards
- Vibration damping for shipboard piping systems
Installation flexibility is provided through multiple face-to-face dimensions compliant with JIS B2002. Optional accessories include:
- Locking handwheel kits (LH series)
- Position indicators (PI-3A/B)
- Extended stem versions for insulated lines
Operational Benefit: The non-rising stem design prevents accidental impact damage in confined engine room spaces while eliminating the need for overhead clearance during operation.
With over 28 years of maritime valve manufacturing expertise, Chengxin Valve ships ready-to-install units with complete documentation including material test reports and installation manuals. Our global service network covers major ports through partnerships in South America, Eastern Europe, Africa, and the Middle East.
Frequently Asked Questions
Q1: What piping materials are compatible with this valve?
Compatible with carbon steel, stainless steel (304/316), and copper-nickel alloy pipes meeting JIS G3452/G3459 standards.
Q2: Can the valve handle seawater with high sediment content?
Yes, the wedge design incorporates sediment channels that prevent particle accumulation. Regular maintenance every 2,000 operating cycles is recommended.
Q3: Are emergency replacement parts available?
Critical components (gaskets, stem nuts) are stocked at our Qingdao warehouse for 24-hour dispatch to major ports.
Q4: What is the lead time for DN200 size valves?
Standard sizes ship in 15 days; non-standard configurations require 30-45 days production time.
Q5: Do you provide installation supervision?
Technical advisors available upon request for commissioning support at key Middle Eastern ports.
Experience the Chengxin difference: Contact our marine valve specialists today to discuss your project requirements and request certified test samples. All valves include 5-year limited warranty against manufacturing defects.
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