Manual Hard Seal Gate Valve is a classic heavy-duty industrial shut-off valve operated by handwheel.Adopting metal-to-metal hard sealing structure with precision grinding and lapping sealing surface,it possesses excellent high temperature resistance,high pressure resistance,wear resistance and scouring resistance.Different from soft seal gate valve,all sealing parts are made of high-hardness alloy materials.With simple structure,stable performance and reliable operation,it is widely used in high temperature,high pressure pipeline systems of petroleum,chemical industry,power plant,metallurgy and heating engineering.

Key Design Features

Premium Hard Sealing Performance

Metal hard sealing pair with fine grinding and precision lapping process.

Alloy surfacing on sealing surface features strong wear resistance,oxidation resistance and high temperature corrosion resistance.

Stable sealing under high pressure and high temperature working conditions,resistant to medium flow scouring.

Good structural rigidity,not easy to deform and damage under frequent opening and closing.

Reliable Manual Operation Structure

Driven by handwheel with reasonable torque design,easy and labor-saving on-site operation.

Elevating stem structure,stem position intuitively shows opening and closing status.

Multiple packing seal design on valve stem,effectively prevents high temperature medium leakage along stem.

Compact and sturdy overall structure,simple internal mechanism with few failure points.

High Strength Valve Body Material

Valve body mainly made of high-quality cast carbon steel WCB,optional stainless steel CF8,CF3M.

High structural strength,able to bear extreme pressure and temperature impact.

Large full-bore flow channel,small fluid resistance and low pressure loss during medium flowing.

Bolted bonnet structure,convenient for internal component maintenance and replacement.

Long Service Life&Low Maintenance

Alloy sealing surface greatly reduces abrasion and erosion damage.

Few vulnerable parts,simple daily maintenance.

Excellent high temperature aging resistance,stable performance in long-term continuous operation.

Solid casting body with good shock resistance and long overall service life.

Technical Specifications

Size Range:DN15~DN1000

Pressure Rating:PN16,PN25,PN40,PN63,PN100,Class 150/300/600

End Connection:Flanged connection,welded connection

Face-to-Face Dimension:According to GB,DIN,ANSI standard

Temperature Range:-29℃~425℃

Applicable Media:Steam,high temperature hot water,crude oil,oil products,natural gas,high temperature corrosive media

Inspection Standard:API 598,ISO 5208,EN 12266

Main Advantages

Excellent resistance to high temperature,high pressure and medium scouring.

Alloy hard sealing surface with high wear resistance and long service life.

Simple and reliable manual operation,no power supply required.

Compact structure,solid body and strong environmental adaptability.

Standard connection size,convenient for pipeline installation and replacement.

Less maintenance cost and stable long-term working performance.