Double Seal Valves

Alfa Laval Double Seal Valves

Alfa Laval double seal valves are cost-effective mixproof valves that safely handle the simultaneous flow of two different products or fluids through the same valve without the risk of cross-contamination. These standardized top-loaded pneumatic valves are ideal for hygienic applications that require additional safety, leakage detection and Cleaning-in-Place (CIP) across the dairy, food, beverage, home-personal care and many other industries.

Alfa Laval SMP

• Safe, reliable and economical mixproof valves for safe separation of two different products in piping systems of hygienic and aseptic processes
• Safely isolates two process fluids or a process fluid and cleaning media without the risk of contamination
• Increases both operational and product safety due to self-draining design
• Produces higher quality products at lower costs using aseptic double seal valves to secure your process
• More uptime secured through fully maintainable actuator for precision valve control
• Low maintenance due to few, yet durable, moving parts and a top-loaded design that provides easy access for disassembly and service

Maximize product safety and process reliability while minimizing costs and contaminant risks with Alfa Laval double seal valves. Handle both process and CIP fluids at the same time with ease. A great alternative to double-seat mixproof valves, these standardized, cost-effective double shutoff valves come in hygienic and aseptic models and are available in a variety of valve body configurations as shutoff valves.

Alfa Laval SMP Mixproof Valves for Hygienic Applications

Alfa Laval SMP-BC Valve

The Alfa Laval SMP-BC Mixproof Valve is a hygienic, pneumatic double-seal valve specifically engineered to handle the simultaneous flow of two different products without any risk of cross-contamination. This top-loaded valve is both standardized and cost-effective, featuring quick leakage detection to ensure maximum product safety and minimal maintenance requirements due to its few moving parts. It is frequently employed in Cleaning-in-Place (CIP) lines and can be utilized in various systems handling different products.

Benefits

• Hygienic double-seal mixproof valve
• Versatile, modular design meets most hygienic application requirements
• Cost effective

Incorporating advanced features, the Alfa Laval SMP-BC Mixproof Valve is purpose-built for hygienic applications necessitating extra safety measures, leakage detection, and Cleaning-in-Place (CIP) procedures. It finds extensive utilization in diverse industries, including dairy, food and beverage, personal care, and various others.

Economic mixproof valves

Alfa Laval offers two double-seal mixproof valves: The Alfa Laval SMP-BC and the aseptic version, SMP-BCA. The SMP valves enable the flow of two different media through the same valve simultaneously without any risk of cross-contamination. This increases operating efficiencies and significantly reduces operating costs.

High application flexibility

Based on a modular structure, SMP mixproof valves have several valve bodies and components that can be combined in various ways. These self-draining mixproof valves can, for instance, be configured as stop valves and changeover valves.

SMP mixproof valves are constructed from a series of base components, which enables valves to easily be configured to meet different requirements in sanitary and aseptic applications.

Simplified valve maintenance

Few moving parts, a top-loaded plug, and a maintenance-friendly actuator make SMP mixproof valves easy to disassemble for quick, straightforward maintenance.

SMP mixproof valve range

The Alfa Laval SMP mixproof valve range offers two standard cost-effective alternatives to the premium Alfa Laval Unique mixproof valve range:

• SMP-BC mixproof valve for applications that require additional safety, leak detection and CIP
• SMP-BCA mixproof valve for aseptic applications

For more information, please refer to Documentation.

Aseptic version: SMP-BCA Valve

The aseptic version of Alfa Laval's SMP mixproof valve is called SMP-BCA, which is designed for use under mixproof aseptic conditions and sterilization involving high temperatures.

The straightforward design keeps liquids separate by using two seals on the same plug, with a leakage chamber in between. The PTFE / rubber diaphragm following the movement of the plug in the upper section of the valve body ensures that there is no increase in the concentration of microorganisms in the product during processing.

Compliance with most hygienic standards

Alfa Laval SMP valves meet most standards requested in the dairy, food and beverage, and personal care industries.

Please refer to Documentation for more information.

How it works

Construction

The construction of the Alfa Laval SMP mixproof valve range varies, depending on the valve model (SMP-BC and SMP-BCA).

The SMP-BC mixproof valve consists of an actuator, bonnet, plug and valve bodies. Three versions are available: a shut-off valve with one valve body, a shut-off valve with two valve bodies, and a changeover valve with three valve bodies. Clamp rings and a plug clip system secure the valve bodies to the actuator. The clamp ring enables you to turn the valve in any direction.

The SMP-BCA mixproof valve consists of the same valve components as the SMP-BC, but is fitted with a PTFE/EPDM diaphragm designed to prevent contamination from external sources and to withstand high temperatures. This makes the SMP-BCA ideal for use under aseptic conditions.

Operating principles

SMP-BC mixproof valve

The SMP-BC mixproof valve is fitted with two small pneumatic normally open (NO) valves, a detecting valve and a CIP valve. The valve plug has two seals, which form an atmospheric leakage chamber. Any product leakage is discharged through the detecting valve. The leakage chamber may be cleaned by supplying CIP into the detecting valve. The SMP-BC is insensitive to water hammer in the product line above the plug. For changeover valves, a single seal plug separates the lower product lines.

SMP-BCA aseptic mixproof valve

The SMP-BCA aseptic mixproof valve is a normally closed (NC) valve with a proven PTFE/EPDM diaphragm. The special designed aseptic diaphragm hermetically seals against intrusion from the atmosphere and ensures full protection against the effects of microorganisms. It also prevents product build-up on the product contact surface. The valve plug has two seals, which form an atmospheric leakage chamber. Any product leakage is discharged through the detecting valve. The leakage chamber may be cleaned by supplying CIP into the detecting valve. Two small pneumatic normally open (NO) valves enable a sterile barrier to be established in the leakage chamber through the continuous application of steam. The chamber must be clean and sterile when the main valve is closed. For changeover valves, a single seal plug separates the lower product lines but does not require the use of a sterile barrier in the leakage chamber.

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