WJ41H Bellows Sealed Globe Valve
- WJ41H bellows sealed globe valve for zero stem-leak steam, water & oil service, PN16–PN25
- Double seal: austenitic stainless steel bellows primary + flexible graphite packing secondary
- Carbon steel WCB body, 2Cr13 chrome stainless steel stem & disc, DN25–DN150
- Maintenance-free bellows eliminates routine packing adjustments — ideal for fugitive emission control
- Rising stem design with hard alloy seat surfacing option for demanding high-temperature applications
Gaoshan Valve — WJ41H Bellows Globe Valve
Model: WJ41H-16C / WJ41H-25 | Pressure: PN16 / PN25 | Connection: Flanged | Medium: Steam, Corrosive Media
Steam
Oil & Petroleum
Non-Corrosive Media
The WJ41H series is a flanged bellows-sealed globe valve engineered for applications where zero stem leakage is non-negotiable. Unlike conventional globe valves that rely solely on gland packing for stem sealing, the WJ41H features an austenitic stainless steel bellows element welded between the stem and bonnet, creating a hermetically sealed barrier that eliminates fugitive emissions at the stem. A flexible graphite packing gland serves as a secondary backup seal, providing double-barrier protection in the unlikely event of bellows wear or failure.
The bellows design also dramatically reduces maintenance requirements, as the primary seal is maintenance-free for the rated cycle life of the bellows element — no periodic packing adjustment or replacement is needed under normal operating conditions. Body and bonnet are cast in WCB carbon steel for reliable PN16 or PN25 service up to 425°C. The valve stem and disc sealing face are chrome stainless steel (2Cr13), with an optional hard alloy (stellite) surfacing on the seat for demanding steam and high-temperature oil applications.
Available in DN25–DN150 with a rising stem design for clear open/closed position indication. The WJ41H-16C suits general PN16 water, steam, and non-corrosive media, while the WJ41H-25 extends service to PN25 higher-pressure systems. Compliant with GB/T design and testing standards, this series is widely specified for steam distribution, thermal oil heating circuits, chemical transfer lines, district heating, and any service where stem leakage poses a safety, environmental, or product-quality risk.
Applicable medium: water, steam, oil and non-corrosive media. Shell test = 1.5× PN; Seal test = 1.1× PN. Temperatures shown are for standard WCB body material. Flange dimensions refer to Page P95 “Flange Dimension Table”.
(L = Face-to-Face Length, H = Handwheel Center Height, D0 = Handwheel Diameter)
Dimensions shown are for WJ41H-16C reference. Flange connection dimensions refer to Page P95 “Flange Dimension Table” in the product catalog. Contact us for PN25 specific dimensional drawings.
Structure drawing for reference only. Contact us for certified dimensional drawings and detailed bellows specifications.
GB/T 13927
GB/T 12224
API 598
ISO 5208
ISO 15848-1
TA-Luft
- Install with flow direction matching the arrow cast on the valve body — globe valves are directional and will not seal properly if reversed.
- The bellows element is a welded, maintenance-free primary seal. Do not attempt to disassemble or adjust the bellows — this can damage the hermetic weld.
- Periodically inspect the secondary packing gland for any signs of media leakage, which would indicate bellows damage. Tighten packing gland evenly if needed — but do not over-tighten.
- For steam service, install a steam trap downstream to prevent condensate hammer and thermal shock to the bellows element.
- Allow adequate clearance above the handwheel for full stem travel. The rising stem provides visual open/close position indication.
- Steam Distribution Networks & District Heating Systems
- Thermal Oil Heat Transfer & Hot Oil Circulation Loops
- Chemical & Petrochemical Transfer Lines (Non-Corrosive)
- Pharmaceutical & Food-Grade Process Piping
- Hazardous Media Service Requiring Fugitive Emission Control
- Boiler Feedwater, Condensate Return & High-Purity Water Systems