Parallel Slide Gate Valve (A105 Forged Steel Body)
Description
Parallel Slide Gate Valve (A105 Forged Steel Body) – Technical Datasheet
1. Product Overview
This product is a high-performance Parallel Slide Gate Valve, designed for reliable shut-off and isolation in demanding, high-pressure industrial pipelines. As shown in the provided images, it features a robust ASTM A105 forged carbon steel body, a bolted bonnet design, a rising stem with visible threads, and a manual handwheel. Unlike wedge gate valves, this valve utilizes two parallel discs that are pushed apart by a spring or internal pressure to create a tight seal on both upstream and downstream seats. The forged A105 construction provides superior structural integrity compared to cast steel, making it ideal for power plants, high-pressure steam lines, and critical water systems.
2. Technical Specifications
| Parameter | Specification |
|---|---|
| Product Name | Parallel Slide Gate Valve (Double Disc Gate Valve) |
| Body Material | ASTM A105 (Forged Carbon Steel) |
| Nominal Diameter (DN) | DN15 – DN600 (Customizable upon request) |
| Nominal Pressure (PN) | Class 150 – Class 2500 / PN16 – PN420 |
| Connection Type | Flanged (RF / FF / RTJ) |
| Operation Mode | Manual (Handwheel) |
| Stem Type | Rising Stem (Visible threads as shown in images) |
| Bonnet Type | Bolted Bonnet |
| Applicable Temperature | -29°C ~ +425°C |
| Applicable Medium | Steam, high-temperature water, oil, gas, corrosive fluids |
| Design Standard | API 602 / ASME B16.34 / DIN 3352 |
3. Material of Main Parts (A105 Standard Configuration)
| Part Name | Standard Material | Optional Material |
|---|---|---|
| Body | ASTM A105 (Forged Carbon Steel) | A182 F11 / F22 / F304 / F316 |
| Bonnet | ASTM A105 (Forged Carbon Steel) | A182 F11 / F22 / F304 / F316 |
| Discs (Parallel) | A105 + Stellite Overlay | SS304 / SS316 + Stellite Overlay |
| Seat Rings | Stainless Steel / Stellite Overlay | SS316 + Stellite |
| Stem | Stainless Steel (SS410 / SS304) | SS316 |
| Handwheel | Cast Iron / Ductile Iron | Carbon Steel |
| Packing | Flexible Graphite | PTFE |
| Gasket | Spiral Wound Gasket (SWG) | Metal Ring Joint |
4. Applicable Standards
| Standard Type | Reference Standard |
|---|---|
| Design & Manufacture | API 602 / ASME B16.34 / DIN 3352 |
| Flange Connection | ANSI B16.5 / DIN 2501 / JIS B2212 / GB/T 17241.6 |
| Face to Face | ASME B16.10 / DIN 3202 / EN 558 |
| Pressure Test | API 598 / ISO 5208 / GB/T 13927 |
5. Key Features
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Superior Forged A105 Body: The ASTM A105 forged carbon steel body offers higher tensile strength, density, and structural integrity than cast steel (WCB), making it highly reliable for high-pressure and high-temperature applications.
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Parallel Disc Design: The parallel double-disc configuration ensures a tight, bi-directional seal across a wide temperature range. It eliminates the risk of wedging or sticking found in traditional wedge gate valves.
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Low Operating Torque: Due to the parallel disc design and the lack of a wedging effect, the manual handwheel operation requires significantly less torque, making it easier to open and close.
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Thermal Expansion Compensation: The spring-loaded parallel discs automatically compensate for thermal expansion and contraction of the pipeline, ensuring a reliable seal even under rapid temperature changes.
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Robust Bolted Bonnet: The bolted bonnet design allows for easy disassembly and maintenance of internal components (discs, seats, stem) without removing the entire valve body from the pipeline.
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Clear Visual Position Indicator: The rising stem design provides a clear visual indication of the valve’s open or closed position directly from the exposed threaded stem.
