In mechanical engineering, a parallel gate valve refers to a valve type with sealing surfaces parallel to the vertical centerline. Its typical structure includes a thrust wedge or spring preloading device, achieving sealing surface contact through wedge mechanical compensation or spring preload. It is primarily used in low-pressure delivery systems with nominal diameters ranging from DN40 to DN300.
Advantages:
Low fluid resistance
Unrestricted medium flow direction
Technical Limitations:
Prone to sealing surface abrasion
Higher maintenance difficulty
Advantages & Characteristics
Straight-through flow channel: Pressure loss ≤ 0.03 MPa
Sealing surface perpendicular to flow when fully open: Effectively reduces erosion rate
Excellent castability: Body can be formed via sand casting
Technical Limitations
High friction coefficient of sealing surfaces: Prone to scratches during operation
Precision required for dual-disc clearance: Higher machining costs
No forced sealing capability: Unsuitable for media containing solid particles (e.g., slurry)
Specification
Size: 18''
Pressure: 150LB
Material: WCB
| Valve Material | cast steel, stainless steel, special alloy |
| Valve Test | 100% quantity tested before delivery |
| Valve Guarantee | 18 months after shipments and 12 months after installed |
| Valve Color | Customer request |
| Valve Packing | Plywood Case for Gate Valve |
