Control/Check Valves

Alfa Laval control and check valves manage the flow of process liquids and gases through hygienic process systems. Easy to install, operate and maintain, these valves safeguard process integrity and product quality while preventing potential damage to pipelines and equipment or system shutdown due to reverse fluid flow, pressure surges, water hammer and air entrainment. Fully automated and fast-acting, these hygienic valves provide safe, reliable and cost-effective fluid and gas management.

Protect your hygienic process systems by managing the flow of process fluids and gases – safely, reliably and cost-effectively. Whether preventing contamination from backflow or providing pressure relief, Alfa Laval valves boost productivity and uptime whilst ensuring safe, reliable operation and low cost of ownership. These valves provide reliable and efficient regulation of fluid and gas flows.

The Alfa Laval LKC Non-return Valve is a hygienic one-way check valve for use in various processes across the hygienic industries to prevent reverse flow. It is easy to install, ensuring safety and high product quality. It is available in two versions: the LKC-2 for vertical flow and the LKC-H for horizontal flow.

The LKC Non-return Valve is widely used for single directional product flow through hygienic process lines across the dairy, food, beverage, brewery and many other industries.

Safe and Reliable Process Protection

Alfa Laval LKC-2 non-return valves ensure single directional product flow through process lines. This protects sensitive equipment from reverse flow and avoids pressure surges or costly system shutdowns.

Non-return Valve Range

The standard Alfa Laval LKC-2 valve range is available in 304 or acid-resistant 316L stainless steel. Designed for hygienic applications, it handles up to 10 bar pressure and -10°C to 140°C (EPDM). Available with semi-bright or polished finishes and ISO/DIN welding ends.

Construction

The valve consists of an upper body, lower body, valve plug, seal ring, and guide disc. The clamp-assembled body is sealed hygienically. The guide disc and four legs support the spring-loaded valve plug and O-ring seal. LKC-2 is offered with welding ends for ISO or DIN standards.

Working Principle

A spring keeps the valve closed until inlet pressure exceeds spring force. In case of reverse flow, the spring and outlet pressure keep the valve sealed.

Options

Seal rings in NBR or FPM available for product-wetted areas.

The Alfa Laval LKC UltraPure Non-return Valve is a hygienic one-way check valve for use in various processes throughout the high-purity industry to prevent reverse flow. It is easy to install, ensuring safety and high product quality.

The LKC UltraPure Non-return Valve is designed for single directional product flow, meeting the demands of high-purity applications across the biotechnology, pharmaceutical and personal care industries.

UltraPure Quality

LKC UltraPure is developed to facilitate safe and easy installation that ensures optimum integrity. This valve offers high and consistent quality and thorough documentation which meet the strict standards of the biotech, pharmaceutical and personal care industries.

High and Consistent Quality

All LKC UltraPure valves are subject to rigorous quality control. Alfa Laval performs incoming and outgoing inspections and closely monitors every aspect of the manufacturing process – from raw material sourcing to tolerance and surface finish inspection to packaging and labelling. Tolerances and all surface finishes are inspected with calibrated equipment to ensure the highest possible quality.

Comprehensive Documentation

As part of the Tri-Clover UltraPure portfolio, the LKC UltraPure is supplied with Alfa Laval Q-doc, a full documentation package offering transparency from raw material to final delivery. Based on Good Documentation Practice (GDP), Q-doc supports qualification, validation, and change control procedures and helps ensure reliable, traceable product quality.

The Q-doc package includes quality and manufacturing procedures, material certificates, and full traceability – maximizing uptime and minimizing operational risks.

How it Works

Application:
Tri-Clover® LKC UltraPure is a non-return valve that prevents reverse flow in hygienic processing systems. Designed and documented to meet the stringent demands of BioPharm and Personal Care industries, it ensures high-purity fluid control.

Working Principle:
A spring acts on the valve plug to keep the valve closed. When the inlet pressure exceeds the spring force, the valve opens to allow flow. If reverse flow occurs, the outlet pressure and spring force keep the valve securely closed.

Standard Design

The valve body consists of two parts joined by a clamp ring. A guide disc and four legs ensure proper alignment of the spring-loaded valve plug within the valve body for reliable performance. Installation orientation is important: mounting the valve with proper inclination ensures full drainability, and the four guide legs help maintain alignment and sealing integrity.

The Alfa Laval LKUV-2 is a reliable, self-acting air relief valve that releases excess air from process pipelines or pumps to prevent cavitation and product loss. Vertically installed, it is ideal for applications where air must be removed to maintain design pressure, such as the top of a pipeline or pump suction inlet.

This self-acting valve is ideal for air-venting duties in hygienic applications across the dairy, food, beverage and many other industries. It is commonly used in Cleaning-in-Place return line (CIP-R) applications.

Reliable Air Relief Valve

The Alfa Laval LKUV-2 is an automatic double-seat valve designed to relieve excess air from process systems. When mounted vertically on the top of a pipeline, container or pump inlet, it ensures safe and efficient air removal to maintain design pressure and avoid product damage.

Improved Processing Efficiency

By removing air from hygienic systems, the LKUV-2 valve prevents entrainment and contributes to consistent product quality, reduced energy consumption, and protection of process equipment from pressure shocks and water hammer.

LKUV-2 Valve Range

Constructed in high-grade stainless steel with a bright finish, Alfa Laval LKUV-2 air-relief valves are available in multiple dimensions to suit most hygienic process systems. They are designed to handle up to 10 bar product pressure and temperatures up to 90°C (194°F).

How It Works

Construction:
The valve consists of an upper valve body, a lower body with welding stub, seal ring, and a freely moving polypropylene ball. The components are clamped together to form a secure, hygienic unit.

Operating Principle:
The polypropylene ball responds to pressure changes. When air builds up, the ball lifts off its lower seat, venting air to the atmosphere. Once pressure equalizes, the ball returns to seal the valve shut.

Options

• Seal ring available in NBR (Buna N) or FPM (SFY)

The Alfa Laval SB Self-cleaning CO₂ Valve is a hygienic gas supply and vent valve designed to regulate the flow of carbon dioxide in tank top systems. It ensures safe venting and pressurizing of vessels while maintaining full cleanability and hygiene. This cost-effective solution is ideal for use in breweries and other hygienic applications.

This gas management valve is specially developed for hygienic processes and is commonly used in the brewery industry. It regulates carbon dioxide flow for both venting and pressurizing of vessels, ensuring safe pressure levels and minimizing contamination risk.

Safe, Reliable Operation

Thanks to its internal polypropylene valve body and stainless steel spring, the SB Self-cleaning CO₂ Valve offers long-lasting and stable operation. It effectively protects vessels against both overpressure and underpressure scenarios, helping maximize uptime and system reliability.

Hygienic, Self-cleaning Valve

Manufactured in high-grade AISI 316L stainless steel, the valve includes a specially drilled cleaning port that ensures thorough Cleaning-in-Place (CIP) of all internal parts. This helps reduce the risk of contamination and supports hygienic process integrity. Alfa Laval 3.1 traceability certification is available upon request.

How It Works

Construction:
The valve comprises a stainless steel housing, plug, spring and EPDM seal. Inside, a polypropylene valve body and a stainless steel spring keep the valve open under normal conditions. The housing is assembled by a threaded connection, ensuring robust and hygienic design.

Operating Principle:
The spring keeps the valve open for bi-directional CO₂ flow. During CIP, fluid flows counter to the gas direction, pushing the valve body closed to ensure hygienic cleaning. A precision-drilled hole in the valve body guarantees complete cleaning of all wetted parts.

Installation Flexibility

The SB Self-cleaning CO₂ Valve is typically installed as part of the gas/CIP pipe at the top of a tank and can be mounted at an angle up to 45° from vertical. It is also compatible with SCANDI BREW® tank top systems.

The Alfa Laval Unique Vacuum Breaker Valve is a robust pneumatic check valve that prevents vacuum conditions in HTST pasteurization systems. Engineered for hygienic applications in the dairy, food, and beverage industries, it ensures safe, efficient, and reliable operation while offering easy Cleaning-in-Place (CIP) compatibility and low total cost of ownership.

Built on the proven Unique SSSV platform, the Unique Vacuum Breaker Valve is compact, fully automated, and easy to configure for any system. With just a single air connection, it supports full CIP functionality and is ideal for HTST applications that demand hygienic integrity and vacuum protection.

Exceptional Valve Hygiene

The valve features a hygienic plug design and a double-acting lip seal that enhances cleanability and minimizes contamination risks. Its construction supports thorough CIP, making it suitable for aseptic and hygienic processing. The valve is authorized to carry the 3-A symbol, confirming its sanitary design.

Extend Valve Service Life

The unique seat design improves uptime and service intervals. Fewer moving parts reduce wear, minimize downtime, and keep maintenance simple and cost-effective.

Low Total Cost of Ownership

Thanks to its modular and efficient design, the Unique Vacuum Breaker Valve reduces product loss, service requirements, and inventory costs. It provides reliable protection with maximum system uptime and product safety.

Valve Control Integration

The valve can be combined with the Alfa Laval ThinkTop® V50 control unit for full valve monitoring and precise CIP function verification.

How It Works

Construction:
The valve consists of a stainless steel body, seals, actuator, an internal floating ball, and clamp rings for secure assembly.

Operating Principle:
During processing or CIP, internal pressure pushes the ball upwards to seal the vent port. When the pressure drops, the ball lowers, allowing air into the system and preventing vacuum conditions. During CIP, a pneumatic actuator pulses to lift the ball off its seat, enabling full cleaning of internal components. Cleaning fluid is drained through the vent port during the actuator pulse.