Lower Discharge Valve for Upper Seal Feeder | Specifications & Verification

Product Specifications

Technical details and manufacturing context for Lower Discharge Valve

Definition

The Lower Discharge Valve is a component used in the Upper Seal Feeder system, positioned at the bottom discharge point to regulate the flow of materials exiting the feeder. It is designed to ensure precise material discharge while maintaining the sealing integrity of the system. The valve is typically made of stainless steel, with body material options of WCB or CF8M (carbon or stainless steel) as per ASTM A216/A351. The seat material is PTFE or RPTFE (ASTM D4894) for chemical resistance. Key parameters include a nominal diameter of 50–200 mm (ISO 6708), operating pressure of 1.0–1.6 MPa, test pressure of 2.4 MPa (hydrostatic shell test per ISO 5208), and operating temperature range of -20 to 120°C (ISO 10434). The leakage rate is class VI at 0.01%. The flow coefficient (Cv) ranges from 120–450 (full open, water at 20°C, ISO 10791). Actuation torque is 50–200 N·m (ISO 5211) for manual or gear operation. Flange standards are PN16/150LB (ISO 7005-1/ASME B16.5), and actuator mounting follows ISO 5211 patterns F10–F16. Weight varies from 15–80 kg depending on size and rating. These values are reference ranges and must be verified for the specific model and application. The valve operates via mechanical or pneumatic actuation to open and close the discharge port, allowing controlled material flow when open and creating a seal to prevent leakage and maintain system pressure when closed. It is essential to confirm all specifications with the legal manufacturer or supplier before procurement.

Working Principle

The Lower Discharge Valve operates through mechanical or pneumatic actuation to open and close the discharge port. When the actuator moves the valve to the open position, the discharge port is opened, allowing controlled material flow from the feeder. When closed, the valve creates a seal against the seat, preventing leakage and maintaining system pressure. The actuation torque required is 50–200 N·m, suitable for manual or gear operation. The valve's sealing performance is rated at class VI leakage (0.01%), ensuring minimal leakage when closed. The operating pressure range is 1.0–1.6 MPa, and the temperature range is -20 to 120°C, limited by seat material. The flow coefficient (Cv) ranges from 120–450, indicating the flow capacity at full open. The valve is designed to match the feeder outlet size (nominal diameter 50–200 mm) and is tested at 2.4 MPa hydrostatic pressure. Proper actuation and sealing are critical for reliable operation.

Common Materials

Stainless Steel

Technical Parameters

Parameter	Typical range	Notes & selection driver
Nominal Diameter	50–200 mm	Matches feeder outlet sizeISO 6708
Operating Pressure	1.0–1.6 MPa	Below 1.0 MPa seat load insufficient
Test Pressure	2.4 MPa	Hydrostatic shell test
Operating Temperature	-20–120 °C	Seat material limitsISO 10434
Leakage Rate	0.01 %	Class VI seat leakage
Flow Coefficient	120–450 Cv	Full open, water at 20°CISO 10791
Actuation Torque	50–200 N·m	For manual or gear operationISO 5211
Body Material	WCB/CF8M	Carbon or stainless steelASTM A216/A351
Seat Material	PTFE/RPTFE	Chemical resistanceASTM D4894
Weight	15–80 kg	Depends on size and rating
Flange Standard	PN16/150LB	Drilling per standardISO 7005-1/ASME B16.5
Actuator Mounting	ISO 5211	F10–F16 patternISO 5211

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

Valve Body
Main structural housing that contains the valve mechanism

Material: Stainless Steel
Valve Seat Part
Sealing surface that creates a tight seal when valve is closed

Material: PTFE or Rubber
Actuator
Mechanism that opens and closes the valve (pneumatic, electric, or manual)

Material: Aluminum or Steel

Applied To / Applications

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

Upper Seal Feeder

View system integration details

Manufacturers of Lower Discharge Valve

Manufacturer profiles associated with Lower Discharge Valve.

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Frequently Asked Questions

What is the operating pressure range of the Lower Discharge Valve?

The operating pressure range is 1.0–1.6 MPa. Always verify the exact rating for your specific model.

What materials are used for the valve body and seat?

The body material can be WCB (carbon steel) or CF8M (stainless steel) per ASTM A216/A351. The seat material is PTFE or RPTFE per ASTM D4894, providing chemical resistance. The valve is also listed as stainless steel in the materials on file.

What is the leakage rate when the valve is closed?

The leakage rate is class VI, with a maximum of 0.01%. This ensures minimal leakage under closed conditions. Actual performance should be confirmed with the manufacturer.

How is the valve actuated?

The valve can be actuated mechanically or pneumatically. The required actuation torque is 50–200 N·m, suitable for manual or gear operation. The actuator mounting follows ISO 5211 patterns F10–F16. Verify compatibility with your actuator.

Data Basis

Editorial classification, named public sources where available, and source-reviewed manufacturer records.

Preliminary Technical Classification

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pressure:	0 to 10 bar (g)
flow rate:	Up to 50 m³/h
temperature:	-20°C to 150°C
slurry concentration:	Up to 60% solids by weight

Lower Discharge Valve

Product Specifications

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