Upper Gate Valve for Upper Seal Feeder | Specifications & Verification

Product Specifications

Technical details and manufacturing context for Upper Gate Valve

Definition

The Upper Gate Valve is a critical component within the Upper Seal Feeder system, positioned in the upper feed section. Its primary function is to regulate, start, or stop the flow of sealing materials, powders, granules, or other substances entering the feeder. It operates by vertically moving a solid gate (wedge or parallel disc) into or out of the flow path, providing a tight shut-off to prevent leakage and ensure precise material dosing into the subsequent sealing process. The valve is available in materials such as stainless steel (e.g., 304, 316), carbon steel, and cast iron, with body material grades like WCB or CF8M. It is designed for nominal diameters from DN50 to DN300, operating pressures from 1.0 to 1.6 MPa, and temperatures from -20°C to 120°C. The leakage rate is class A per ISO 5208, with a maximum of 0.1 mL/min. Flow coefficients range from 120 to 1800 Cv, and actuation torque ranges from 50 to 300 N·m. Face-to-face dimensions vary from 150 to 500 mm. Seat materials include PTFE or RPTFE for chemical resistance. The valve weighs between 15 and 120 kg, depending on size and pressure class. It offers ingress protection ratings from IP65 to IP68 for outdoor or washdown environments. Electrical control is available at 24 V DC ±10% for solenoid pilot or actuator operation. The valve can be actuated manually, pneumatically, or electrically. It is essential to verify model-specific values and standards with the legal manufacturer or supplier before procurement.

Working Principle

The valve operates via an actuator (manual handwheel, pneumatic, or electric) that drives a stem connected to the gate. When the actuator is engaged, the stem lifts or lowers the gate. In the open position, the gate retracts fully into the valve bonnet, creating an unobstructed flow path with minimal pressure drop. In the closed position, the gate is driven down between two parallel or angled seats, creating a mechanical seal that blocks flow. The sealing is achieved by the contact between the gate faces and the valve body seats, often assisted by the line pressure.

Common Materials

Stainless Steel (e.g., 304, 316), Carbon Steel, Cast Iron

Technical Parameters

Parameter	Typical range	Notes & selection driver
Nominal Diameter	DN50–DN300 mm	Standard sizes for pipeline integrationISO 6708
Operating Pressure	1.0–1.6 MPa	Below 1.0 MPa the seat load is insufficient
Operating Temperature	-20–120 °C	Above 120°C seal degradation riskISO 10434
Leakage Rate	≤0.1 mL/min	Class A seat leakage Class A seat leakage per ISO 5208ISO 5208
Flow Coefficient	120–1800 Cv	Cv range for full open gateISO 10791
Actuation Torque	50–300 N·m	For manual or gearbox operationISO 5211
Face-to-Face Dimension	150–500 mm	Short pattern per ISO 5752ISO 5752
Body Material	WCB/CF8M	Carbon steel or stainless steelASTM A216/A351
Seat Material	PTFE/RPTFE	PTFE for chemical resistanceASTM D4894
Weight	15–120 kg	Varies with size and pressure class
Ingress Protection	IP65–IP68	For outdoor or washdown environmentsIEC 60529
Electrical Control	24 ±10% V DC	For solenoid pilot or actuatorIEC 61131-2

Ranges are indicative industry figures for RFQ preparation, not a supplier commitment. Confirm every value and standard with the legal manufacturer before ordering.

Components / BOM

Gate Part
The solid disc or wedge that moves vertically to block or allow flow. Provides the primary sealing surface.

Material: Stainless Steel
Stem Part
A threaded rod that connects the actuator to the gate, transmitting motion to raise or lower the gate.

Material: Stainless Steel
Body Part
The main pressure-containing structure of the valve, housing the internal components and providing pipe connections.

Material: Cast Iron or Carbon Steel
Seat Rings Part
Fixed rings inside the valve body against which the gate seals to stop flow. Often replaceable.

Material: Stainless Steel or Bronze
Bonnet Part
The cover assembly that houses the stem and provides a pressure boundary, often containing packing to prevent stem leakage.

Material: Same as Body
Actuator
Drives the stem up and down; the stem only carries that motion to the gate.

Applied To / Applications

This component is essential for the following industrial systems and equipment:

Upper Seal Feeder

View system integration details

Manufacturers of Upper Gate Valve

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Frequently Asked Questions

What is the primary function of the Upper Gate Valve?

It regulates, starts, or stops the flow of sealing materials, powders, granules, or other substances entering the Upper Seal Feeder, providing a tight shut-off to prevent leakage and ensure precise dosing.

What materials are available for the valve body?

The valve body can be made of stainless steel (e.g., 304, 316), carbon steel, or cast iron, with material grades such as WCB or CF8M. Seat materials include PTFE or RPTFE.

What are the operating pressure and temperature ranges?

The operating pressure range is 1.0 to 1.6 MPa, and the operating temperature range is -20°C to 120°C. Above 120°C, seal degradation risk increases.

How should I verify the valve's specifications?

Always confirm model-specific values such as nominal diameter, pressure rating, temperature limits, leakage rate, and standards (e.g., ISO 5208) with the legal manufacturer or supplier, as directory data are reference ranges.

Data Basis

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Preliminary Technical Classification

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pressure:	Up to 10 bar (150 psi)
flow rate:	0-100 m³/h
temperature:	-20°C to 150°C
slurry concentration:	Up to 40% solids by weight

Upper Gate Valve

Product Specifications

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