Ductile Iron Concealed Rod Soft Seal Flange Gate Valve

As a common valve type in industrial and civil fields, Shengshi Huagong's ductile iron concealed rod soft seal flange gate valve is mainly used for medium cutoff and flow control in pipeline systems. Its core function is to open and close the fluid in the pipeline by moving the gate up and down, ensuring that the medium flows in a predetermined direction and maintaining the stable operation of the system.

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Product Description

Our Shengshi Huagong's ductile iron concealed stem soft seal flange gate valve uses ductile iron as the main material. Ductile iron has excellent mechanical properties, and its strength and toughness are much higher than ordinary cast iron. It can withstand higher pressure and impact force, providing a solid foundation for the long-term reliable operation of the valve under complex working conditions. The concealed stem design is one of the notable features of this valve. During operation, the valve stem rotates in the valve body, driving the gate to move up and down, and the valve stem itself is not exposed with the rise and fall of the gate. This design makes the appearance of the valve more concise and compact, and occupies less space. It is especially suitable for installation environments with limited space, such as underground pipelines and narrow equipment rooms. At the same time, the soft sealing structure uses elastic soft materials such as rubber as sealing elements. When the valve is closed, the rubber sealing surface on the gate fits tightly with the valve seat, which can effectively compensate for the minor defects and unevenness of the sealing surface, and achieve excellent sealing effect. Even in low-pressure or micro-leakage sensitive systems, it can reliably prevent medium leakage.

Technical parameters

Project	Parameter range
Nominal diameter	DN50 - DN1200 (larger or smaller diameters can be customized according to special needs)
Nominal pressure	PN1.0MPa - PN4.0MPa (some special models can withstand higher pressure)
Applicable temperature	-20℃ - 120℃ (depending on the different rubber sealing materials, the applicable temperature range varies. The use of special high-temperature resistant rubber can further increase the applicable temperature; the use of low-temperature resistant rubber can be used in lower temperature environments)
Applicable medium	Water, steam, air, oil, acid and alkali solution, sewage, industrial wastewater, etc. (different corrosive media are selected according to the rubber sealing material. EPDM rubber is suitable for generally non-corrosive media, and fluororubber is suitable for highly corrosive media)
Valve body material	Ductile iron (common grades include QT400-18, QT450-10, QT500-7, etc.)
Valve cover material	Ductile iron
Gate material	Ductile iron frame + high-performance rubber (rubber material can be selected from EPDM, NBR, FKM, etc. according to the medium and temperature requirements)
Valve stem material	Stainless steel (such as 2Cr13, 304, 316, etc.)
Sealing form	Soft seal (rubber seal)
Connection method	Flange connection, welding connection (the appropriate connection method can be selected according to the requirements of the pipeline system)
Drive mode	Manual, electric, pneumatic, hydraulic (the appropriate drive mode can be selected according to the actual use scenario and control requirements)
Standards	Design, manufacture and test in accordance with relevant domestic standards such as GB (national standards), HG (chemical industry standards) and some international standards such as ISO (International Organization for Standardization) standards and ASME (American Society of Mechanical Engineers) standards to ensure that product quality and performance meet industry standards