Food-Grade Sanitary Diaphragm Valve Core

Product Specifications

Technical details and manufacturing context for Food-Grade Sanitary Diaphragm Valve Core

Definition

This product is a precision-engineered valve core designed specifically for food and beverage manufacturing equipment. It serves as the critical sealing and flow control component within sanitary diaphragm valves used in processing lines. The core ensures product purity by creating a sterile barrier between the process fluid and the actuation mechanism. It is essential in B2B supply chains for maintaining hygienic standards in dairy, brewing, and liquid food production. The valve core is available in a range of configurations to suit different piping sizes and operating conditions. It is constructed from materials that meet food-grade requirements, including 316L stainless steel for the body and FDA-approved EPDM or PTFE for the diaphragm. The core is designed to operate within a temperature range of -40 to 85°C. The surface finish is specified as Ra 0.4 to 0.8, ensuring cleanability. The diaphragm thickness ranges from 3 to 5 mm, and the actuation force required for full operation is between 500 and 2000 N. The leakage rate at rated pressure is 0.1 mL/min, and the cycle life is 100,000 cycles under normal conditions. The weight varies from 1.5 to 8 kg depending on size. All parameters are reference ranges that must be confirmed for the specific model and application. Standards such as ISO 1127, ISO 5208, ISO 4287, ASTM A276, and FDA 21 CFR 177.2600 are listed as procurement references, not as proof of certification. Buyers should verify model-specific values and compliance with the legal manufacturer or supplier.

Working Principle

The valve core operates by using a flexible diaphragm that is mechanically actuated to press against a weir or seat. This action creates a seal that isolates the fluid path from the valve body and actuator. When the actuator is engaged, the diaphragm is pushed down, closing the valve and preventing flow. When released, the diaphragm lifts, allowing fluid to pass. This design ensures that the process fluid only contacts the diaphragm and the valve body, which are made of hygienic materials, preventing contamination. The diaphragm acts as a barrier, ensuring no fluid enters the actuator mechanism. The core is designed to provide a tight seal even at low pressures, and the actuation force is sufficient to overcome the fluid pressure and achieve a leak-tight closure. The working principle is simple yet effective for maintaining hygienic conditions in food processing.

Common Materials

316L Stainless Steel, FDA-Approved EPDM, PTFE

Technical Parameters

Parameter	Typical range	Notes & selection driver
Port SizeRequired	DN15–DN100 inches	Nominal diameter of fluid connectionISO 1127
Pressure RatingRequired	1.0–1.6 psi	Maximum allowable working pressureISO 5208
Temperature RangeRequired	-40–85 °C	Operational temperature limits
Surface FinishRequired	0.4–0.8 Ra	Surface roughness for cleanabilityISO 4287
Diaphragm Thickness	3–5 mm	Thickness of the sealing diaphragm
Actuation Force	500–2000 N	Force required for full valve operation
Body Material	316L	Corrosion resistantASTM A276
Diaphragm Material	EPDM	Food-grade elastomerFDA 21 CFR 177.2600
Leakage Rate	0.1 mL/min	At rated pressureISO 5208
Cycle Life	100000 cycles	Under normal conditions
Weight	1.5–8 kg	Depends on size

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

Diaphragm Part
Flexible membrane that creates the seal

Material: FDA-Approved EPDM or PTFE
Valve Body
Main structural housing for the core

Material: 316L Stainless Steel
Seat Ring Part
Precision surface against which diaphragm seals

Material: 316L Stainless Steel
Actuator Stem Part
Mechanical interface for valve actuation

Material: 316L Stainless Steel
Gasket Set Optional Part
Secondary sealing between core and valve housing

Material: FDA-Approved Silicone

Industry Taxonomies & Aliases

Commonly used trade names and technical identifiers for Food-Grade Sanitary Diaphragm Valve Core.

Manufacturers of Food-Grade Sanitary Diaphragm Valve Core

Manufacturer profiles associated with Food-Grade Sanitary Diaphragm Valve Core.

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Frequently Asked Questions

What materials are used in this valve core?

The valve core is made with 316L stainless steel for the body and FDA-approved EPDM or PTFE for the diaphragm. These materials are chosen for their corrosion resistance and food-grade compliance.

What are the operating temperature and pressure limits?

The temperature range is -40 to 85°C. These are reference values; always confirm with the manufacturer for your specific application.

How does the valve core prevent contamination?

The flexible diaphragm creates a sterile barrier between the process fluid and the actuator, ensuring that the fluid only contacts hygienic surfaces. This prevents contamination and maintains product purity.

What is the expected cycle life?

Under normal conditions, the valve core has a cycle life of 100,000 cycles. This is a reference value and may vary depending on operating conditions and maintenance.

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 (145 psi)
flow rate:	Up to 50 m³/h depending on valve size
temperature:	-20°C to 150°C
slurry concentration:	Suitable for slurries up to 40% solids by weight