Forged Steel Parallel Slide Gate Valve
Description
Forged Steel Parallel Slide Gate Valve – Technical Datasheet
1. Product Overview
This product is a high-performance Forged Steel 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 forged steel body (marked “300 LB”), a bolted bonnet design, a rising stem with visible threads, and a manual handwheel. Unlike traditional 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 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 | Forged Steel Parallel Slide Gate Valve |
| Body Material | ASTM A105 (Forged Carbon Steel) |
| Nominal Pressure (PN) | Class 300 / Class 600 / Class 800 / Class 1500 |
| Nominal Diameter (DN) | DN15 – DN100 (1/2″ – 4″) |
| 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 (Forged Steel 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 |
| Coating | Grey Epoxy Resin | Custom colors available |
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 |
| 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 Steel Body: The ASTM A105 forged construction (marked “300 LB” in the images) eliminates casting defects such as porosity and sand holes, offering higher tensile strength and reliability for high-pressure 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 & Rising Stem: The bolted bonnet design allows for easy maintenance without removing the entire valve body. The rising stem (visible in the images) provides a clear visual indication of the valve’s open or closed position.
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Anti-Corrosion Coating: The entire valve is coated with a grey epoxy resin, providing excellent protection against rust and corrosion in harsh industrial environments.
