Parameter Information
Brand: Qigao Valve      Origin: Shanghai       
Color Classification: GD-J16-KF (Manual L-Type) GD-J25-KF (Manual L-Type) GD-J40-KF (Manual L-Type) GD-J50-KF (Manual L-Type) GD-J16-KF (Manual Y-Type) GD-J25-KF (Manual Y-Type) GD-J40-KF (Manual Y-Type) GD-J50-KF (Manual Y-Type) GD-CF16 (Manual L-Type) GD-CF25 (Manual L-Type) GD-CF40 (Manual L-Type) GD-CF50 (Manual L-Type) GDQ-63-ISO (Manual L-Type) GDQ-80-ISO (Manual L-Type) GDQ-100-ISO (Manual L-Type) GDQ-160-ISO (Manual L-Type)

Product Name: Manual High Vacuum Flap Valve                                   Material: Stainless Steel
Applicable Range (PA): 105~1.3*10-4 Valve                 Air Source Pressure: (MPa) 0.4-0.8
Medium Temperature: 1: -25~+80 (Sealing Material: Nitrile Rubber)
2: -30~+150 (Sealing Material: Fluororubber)
3: -30~+260 (Sealing Material: Imported Fluororubber)
Bellows Seal: Sealing primarily relies on bellows. Disadvantage: lifespan approximately 150,000 to 200,000 cycles.
Shaft Seal: Sealing primarily relies on fluororubber and friction sealing with the shaft. No bellows, which increases lifespan to 1 million cycles. Disadvantage: poor corrosion resistance.
The GD series high vacuum flap valve (also known as angle valve) uses manual rotation of threads to generate lifting action. Through internal left-open, right-close thread rotation, it drives the flap up and down to open or close the valve, achieving the purpose of connecting or disconnecting airflow in vacuum systems. The GD-J type is an angle passage style, while the GD-S type is a three-way style with a pre-pumping port. Suitable working media are air and non-corrosive gases.
Stainless steel material with thickened protection, solid construction with every process strictly controlled. Features include sturdiness, wear resistance, and rust resistance. Mirror polishing on both inner and outer surfaces. Bellows seal shaft offers better sealing than rubber tubes, high mechanical strength, long service life with minimal leakage, smooth welding with good flatness, excellent welding technology, and smooth valve handle screw without jamming.
The product is widely used in industries such as petroleum, chemical, steel, pharmaceuticals, environmental protection, mining, papermaking, urban construction, water supply, and drainage.