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Overview
The Extension Stem Butterfly Valve is designed based on a standard butterfly valve with an extended operating stem, mainly used in underground pipelines, valve chambers, or installations where the valve is difficult to access.
By extending the operating mechanism to ground level or a convenient operating position, this valve ensures safe, efficient, and reliable operation under challenging installation conditions.
It is widely applied in municipal water supply, drainage systems, fire protection networks, underground pipeline corridors, and industrial piping systems.
Product Description
This valve adopts a wafer-type / lug-type butterfly valve structure with a compact body and low flow resistance.
The extension stem (extension spindle) allows torque to be transmitted effectively from the operating device to the valve disc, even at extended depths. The extension length can be customized according to site requirements, up to 10,000 mm.
The valve can be equipped with handwheel or worm gear operation, featuring stable transmission, easy installation, and convenient maintenance.
Technical Specifications
| DN(mm) | DN50(2'')~DN800(32'') |
| PN(MPa) | 16Mpa |
| Working temperature ℃ | -23~+121 |
| Exdtend pressure(Mpa) | 0~10000 |
Compact structure and small installation space
Short face-to-face length makes it suitable for confined spaces and underground installations.
Effective torque transmission
Optimized extension stem design ensures smooth and reliable opening and closing.
Flexible extension length
Extension length available from 0 to 10,000 mm, meeting various installation depths.
Rational design for easy assembly and disassembly
Convenient for on-site installation, adjustment, and maintenance.
Low maintenance requirement
Simple structure with fewer wear parts, ideal for long-term service.
The Extension Stem Butterfly Valve is especially suitable for:
Municipal water supply systems
Underground pipelines and valve chambers
Fire protection water networks
Wastewater treatment systems
Industrial pipeline systems
Installations requiring remote or elevated valve operation
It is an ideal solution for valves installed underground or in locations with limited accessibility.
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FAQ
Q1: What media is this valve suitable for?
A: It is suitable for water, oil, gas, and other non-corrosive or mildly corrosive media.
Q2: What pressure ratings are available?
A: The valve supports PN10 and PN16 working pressures.
Q3: Can it be installed in any direction?
A: Yes, the valve can be installed in both horizontal and vertical pipelines.
Q4: What sealing materials are available?
A: Common sealing materials include EPDM and NBR, depending on application requirements.
