Seat Valves

Seat Valves

  • LKAP-seat-valves-

    LKAP seat valves

    Compact and straightforward, LKAP seat valves are reliable air-operated shut-off valves widely used for small flow rates and for dosing applications in the dairy, food and beverage industries.


    The Alfa Laval LKAP seat valve is a quality pneumatic shut-off valve that is based on reliable, proven technology. It is ideal to handle small flow rates of up to 9 m3/h and purpose-built for specialty applications, such as a CIP supply valve to Unique mixproof valves or dosing valves in mixing applications.


    Like all other hygienic Alfa Laval valves, the LKAP features a simple, straightforward design with the fewest possible components and minimal moving parts. Smooth surfaces and sanitary finishes contribute to good hygiene and cleanability.


    The standard Alfa Laval LKAP valve is a normally closed (NC) valve with a two- or three-port valve body (LKAP-V and LKAP-T, respectively). Upon request, the LKAP valve is also available as a normally open (NO) valve.


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


    The LKAP valve consists of an actuator, double lip seal for stem, stem, EPDM sealing and valve body with welding connections. Visual indication of the valve position is provided.

    For remote indication of the valve position, an optional reed switch position transmitter is available.


    The Alfa Laval LKAP seat valve is a normally closed (NC) valve with a spring return that is controlled from a remote location by means of compressed air.


    • Fittings according to required standards
    • Bracket with standard M12 sensors for indication of open and closed positions
    • Product wetted seals of FPM or NBR

    LKAP seat valve

  • Instruction Manual – LKAP – EN

    PD Sheet – LKAP Air-Operated Valve – EN

  • Radial-Diaphragm-Valve-UltraPure

    Radial Diaphragm Valve UltraPure

    This compact, maintenance friendly radial diaphragm valve with its double-sealing system provides true aseptic conditions for sterile applications where leakage, deadlegs or cross-contamination is unacceptable.

  • A true aseptic radial diaphragm valve

    The Alfa Laval Radial Diaphragm Valve UltraPure is a one-piece diaphragm sealing system that delivers reliable, contaminant-free performance. Features that contribute to its superior hygienic design include:

    • Pocket-free design without dome, sump or deadleg
    • Flow optimized design with wide radius for fast Cleaning-in-Place and Sterilization-in-Place (CIP/SIP)
    • Single-seat valve technology with stem shielded behind the diaphragm so it does not travel in and out of the product chamber


    With its compact footprint and straightforward seat-valve design, the Alfa Laval Radial Diaphragm Valve UltraPure is easy to install. Unlike Weir-type valves, our radial diaphragm valve does not require a critical installation angle to eliminate dead legs. Fewer bends and weldings reduce the cost of materials, labour, and associated documentation.

    Assembly is easy using a standard clamp. No tools are required for assembly, re-tightening or adjustment. Plus there are no loose screws, bolts or nuts so diaphragm replacement, when required, takes just a few seconds. This significantly reduces downtime and maintenance costs.


    Engineered for use in biotech, pharmaceutical and aseptic food industries, the Alfa Laval Radial Diaphragm Valve UltraPure provides a high flow rate despite its compact size and small actuator. This flow-optimized design contributes to quick and easy cleaning using CIP/SIP systems.

    With its self-draining design, the Alfa Laval Radial Diaphragm Valve provides full drainability with superior Kv (Cv)values. This contributes to high product recovery and increased profitability.


    Designed for use as a shut-off valve, pass-through valve or a tank outlet valve, the Alfa Laval Radial Diaphragm Valve UltraPure can operate in manual mode or in automatic mode when equipped with a pneumatic actuator. Available in silicone and EPDM, our diaphragms meet the requirements of FDA and USP class VI classifications as well as TSE/ADI declarations. Standard welding or clamp ends are available in ø12.7 mm, ø25.4 mm and ø38 mm dimensions.


    The RDV-UP is a single-seat valve with the stem protected behind a silicone or EPDM diaphragm. The diaphragm has a true aseptic double-sealing system that protects the product from external contamination. The diaphragm protects the stem so that the stem does not travel inside the product chamber, thereby eliminating the risk of contamination being dragged into the product chamber.


    The Alfa Laval Radial Diaphragm Valve UltraPure (RDV-UP) range is designed either for manual operation or for automatic operation.

    Manual operation

    For manual operation, the RDV-UP is controlled by means of a handle. A simple turn of the handle pushes the stem downwards with the diaphragm, pressing it against the seat of the valve body and thereby closing the valve.

    The handle is fitted onto the valve by means of a clamp.

    Automatic operation

    The RDV-UP can be controlled from remote location by means of compressed air using a pneumatic actuator. The actuator controls the axial movement of a piston, thereby opening or closing the valve depending on the actuator function.

    The actuator is available in two standard versions: normally closed (NC) and air/air activated (A/A). The actuator is fitted on to the valve by means of a clamp.


  • Instruction Manual – Radial Diaphragm valve UltraPure – EN


  • Unique-7000-US-

    Unique 7000 (US)

    Tri-Clover Unique 7000 single seat valves combine proven technology and innovative features, with a one-piece body moulded from a single stainless steel disc.


    The one-piece body of the Unique 7000 design is formed from a single stainless steel disc. This ensures  an exceptionally smooth surface finish with no welds, resulting in maximum strength and reliable production, as well as improved hygiene. The ball-shaped body with no dead zones guarantees gentle product treatment and is extremely easy to clean. The upgraded sealing concept, with defined compression of sealing with metal-to-metal contact, results in maximum integrity for the liquids passing through the valve.

    The Unique 7000 valve complies with prevailing health, safety and hygiene regulations in full, is EHEDG certified  and is authorized to bear the 3-A symbol for hygienic equipment design.

    With a minimum of moving parts, the Unique 7000 is also designed for rapid, easy maintenance and to keep spare parts inventories to the minimum.

     Tri-Clover Unique 7000 Tri-Clover Unique 7000 – Standard valve. The Unique 7000 series is an innovative new generation of Tri-Clover single seat valves that are designed to meet the highest process demands of hygiene and safety. They`re built on a well-proven, platform from an installed base of more than 1 million valves.
     Tri-Clover Unique 7000 tank valve Tri-Clover Unique 7000 tank valve cosists of a valve body with or without a tank flange. Available in two different versions for installations that either open into the tank (Direct – Acting) or close up against the tank (Standard version)
     Tri-Clover 7000 - Aseptic valve Tri-Clover 7000 – Aseptic valve. A one-piece diaphram provides hermetic sealing against intrision from the armosphere, ensuring the highest level og hygienic aseptic processing.

    The special diaphragm can also be used with other Unique 7000 units – Including standard, tangenital, two-step and tank outlet valve configurations – where aseptic processing is crucial.

     Tri-Clover Unique 7000 - Y body Tri-Clover Unique 7000 – Y body. An ideal unobstructed flow is required for the most demanding viscous products.
     Tri-Clover Unique 7000 - long stroke valve Tri-Clover Unique 7000 – long stroke valve. Specially suitable for use with media or products that contain particles and/or suspended solids – as well as highly viscous products. In such cases, larger passageways are needed to provide gentler, more effective flow control.
     Tri-Clover 7000 - tangential valve Tri-Clover 7000 – tangential valve features an off-center body so that the port connection can still be drained when the valve is positioned horizontally. Particulary suitable for use in tank openings, horizontally mounted drains ans a wide range of installations where space restrictions make it difficult to install valves at other angles
     Tri-Clover Unique 7000 - two-step valve. Tri-Clover Unique 7000 – two-step valve. Stroke height can be adjusted as required to march specific volumes and quantities. This makes it esoecially suitable for dosing, and to two-stage filling where the focus is on ensuring an exact volume. Can also be used for draining two pipes at the same time
     Tri-Clover Unique 7000 - Reverse acting valve Tri-Clover Unique 7000 – Reverse acting valve provides multiple solutions, for instance, to prevent pressure shocks when the pipework does not permit closing against product flow with the use of standard single seat valves. May be used as an overflow valve after a positive displacement pump or as an muli-port flow diversion valve. Can also be configured as a shut-off valve with two or four ports, or as a changeover valve with tree to six ports.
     Tri-Clover Unique 7000 - fractional valve Tri-Clover Unique 7000 – fractional valve. A fractional valve with the same Unique 7000 design and few moving parts. Widely used in processing food, beverages and dairy products, as well as pharmaceuticals and persoval care products. Ideal for use in sampling, CIP (cleaning-in-place) and other contexts where only lower rates are involved.
     Tri-Clover Unique 7000 - manually operated valve Tri-Clover Unique 7000 – manually operated valve. Small, relatively simple valves that are available with manye different options and features, including lockable flights, for either regulating or dosing purposes.

  • How it works

    A seat valve is opened or closed via a plug that is lifted up or down and held in place by a seat. This type of valve is controlled either manually or by compressed air. It has only a few simple moving parts, making this an extremely reliable, hygienic valve for stopping or diverting product flows in both single and multidirectional processing installations.

    The basic design of the Tri-Clover Unique 7000 unit consists of either one or two valve bodies, clamped together. The TR2 seat ring with enhanced CIP capabilities and better hygiene is standard on all Unique 7000 series valves. These are also available with a controlled-compression elastomer seal ring. The standard actuator is supplied with a five-year warranty.

    An extensive range of control and monitoring equipment can also be fitted to these valves. These range from IndiTop, ThinkTop® Basic and GreenTop units to the advanced ThinkTop®.

    Unique 7000 valves are available in sizes of 1–4 inches, and the range consists of a comprehensive selection of special valve types. These include reverse-acting, long-stroke and manually operated models, in addition to tank outlet valves, aseptic valves, two-step and Y-body valves, and special MO, MR and Flo-Diversion units.

    Unique 7000 - How it works

  • Instruction Manual – Unique Sanitary Mixproof LP and LP-F Valve – EN

    Instruction Manual – Unique 7000 Series Valve – Standard and Reverse Acting – EN

    US Instruction Manual – Unique 7000 Series Aseptic – Manually Operated – EN


  • Unique-single-seat-valves

    Unique single seat valves

    Ideal for uninterrupted production in a broad range of hygiene-critical applications, Unique single seat valves are pneumatic seat valves used to shut off or change product flow.


    Alfa Laval Unique single seat valves (SSVs) are robust and reliable pneumatic seat valves that are supremely reliable and versatile.

    Modularity provides cost-effective and nearly endless possibilities for purpose-built seat valves that meet high standards of hygiene and aseptic compatibility. Configure the Unique SSV valve bodies, plugs and actuators to meet virtually any requirement.

    Superior valve process safetyIn the US and Canada the Unique 7000 corresponds to the Unique single seat valve.

    The Unique SSV range is built on a proven modular platform used on more than a million valves in service worldwide. Pressed from a single stainless steel disc, the valve body is extremely strong and durable, thus ensuring production safety. The enhanced performance of the actuator makes operation safer and more efficient.


    The Unique SSV range is engineered to provide excellent hygiene and cleanability. With a surface finish of Ra ≤ 0.8μm, the smooth, weld-free valve body eliminates crevices that can trap bacteria. The design of the plug supports enhanced cleaning-in-place capabilities, and a double-acting lip seal that minimizes any risk of cross-contamination.

    Alfa Laval Unique SSV valves meet most hygienic standards requested in the dairy, food and beverage, and personal care industries. The Unique SSV range is EHEDG-certified and authorized to carry the 3-A symbol. The range also provides full traceability in compliance with the EU Food Regulation 1935/2004.


    To ensure high sealing quality, the Unique SSV range features defined compression of the O-rings with metal-to-metal contact between plug and seat. This significantly reduces wear and extends valve service life. The standard Unique SSV is supplied with a non-maintainable actuator that has a five-year warranty.


    Thanks to its straightforward, reliable design, the Unique SSV range provides long service life, reduced product loss, greater product safety and more processing uptime. Few moving parts reduce service requirements and inventory costs. More effective CIP procedures with reduced cleaning cycles and, subsequently, the reduced use of cleaning fluids, water and utilities also contribute to the Unique SSV’s low total cost of ownership.


    The Unique SSV range comprises several purpose-built valve configurations. Modularity provides great flexibility to customize valves to your specific requirements.

    Unique SSV valve (standard) Unique SSV valve (standard) for a broad spectrum of processing duties
    Unique SSV reverse-acting valve Unique SSV reverse-acting valve for use in applications where the flow direction does not allow the use of a standard Unique SSV valve to eliminate the risk of pressure shock.
    Unique SSSV small single-seat valves Unique SSSV small single seat valves for use in sampling, CIP and other contexts where only small flow rates are involved.
    Unique SSV tank outlet valves Unique SSV tank outlet valves for installations that open into the tank (reverse-acting version) or close up against the tank (standard version).
      Unique SSV ATEX Unique SSV ATEX valves for intrinsically safe operation in potentially explosive environments.
      Unique SSV Y-body valves Unique SSV Y-body valves for use in installations that involve flows with large particles and/or high viscosity, and where the focus is on particularly gentle treatment of products and flows.
      Unique SSV long-stroke valves Unique SSV long-stroke valves for use where larger openings are required to provide gentler, more effective flow control such as in installations with media or products that contain particles and/or suspended solids and for high-viscosity flows.
    Unique SSV Tangential Unique SSV tangential valves for use in tank openings, horizontally mounted drains and for wherever space restriction make it difficult to install valves at other angles.
    Unique SSV two-step valves Unique SSV two-step valves for use in dosing, two-stage filling where the focus is on ensuring an exact volume or for draining of two pipes at the same time. Adjustable lifting height makes it possible to match specific volumes and quantities.
    Unique SSV manually operated valves Unique SSV manually operated valves for shut off, tank outlet or straightforward regulating or dosing purposes that require small, relatively simple valves with many different options and features, including lockable handles.
    Unique SSV RF valve is available in one size. Unique SSV RF comes with a fixed Kv value of 11 and a plug with almost linear characteristics. It is used for duties where regulating accuracy is essential.
    Unique SSV aseptic valve


    Unique SSV aseptic valve for sterile process applications.   A one-piece diaphragm provides hermetic sealing against intrusion from the atmosphere, ensuring full protection against the effects of microorganisms during processing.

    The special diaphragm offers modularity as it can  be used with a broard range of the Unique SSV configurations  – including standard, tangential, two-step, manual and tank outlet valves. This modularity also support upgradability of already installed valves if the need arises to modify exiting process installations meeting the need of tomorrow…

    The Unique SSV aseptic valve design offers a straight forward design with focus on product safety, sort sterilization time as well as fast and affordable replacement of service parts.


    The Alfa Laval Unique SSV range consists of one, two or three valve bodies, plug, sealing, actuator and clamp ring.


    The Alfa Laval Unique SSV is an air-operated seat valve that is remotely operated by means of compressed air. The valve generally has two working ports for air supply in and for process air supply; for changeover valves, a third port is required.

    Unique SSV Aseptic

    Fully modular with the proven design of the Unique SSV the aseptic single seat valve is equipped with a hermetic sealing diaphragm that ensures true aseptic conditions during operation. It hermetically seals against intrusion from the atmosphere and ensures full protection against the effects of microorganisms

    With a “sandwich construction” of PTFE on the product side, EPDM and an enforcing mesh, the aseptic diaphragm is optimized to guarantee reliable performance and long lifetime. In open position the one-piece diaphragm is mechanically supported by the valve to reduce wear and increase endurance.

    The Unique SSV Aseptic valve is available in both pneumatic and manual configurations.


    Unique SSV                                                            Unique SSV

    aseptic shut-off valve                                       aseptic change-over valve


    • Fully maintainable actuator
    • High-pressure actuator
    • Product wetted seals in HNBR or FPM
    • TR2 plug seal in PTFE for special applications
    • Valve sensing and control devices, incl ThinkTop, ThinkTop Basic and IndiTop
    • Fittings in accordance with required standard
    • External surface finish 3-A bright

  • Instruction Manual – Unique Single Seat Valve – Y-body

    Instruction manual – Unique Single Seat Valve – Two Step

    Instruction manual – Unique Single Seat Valve – Tank Outlet

    Instruction Manual – Unique Single Seat Valve – Standard and Reverse Acting- EN

    Instruction manual – Unique Single Seat Valve – Manually Operated

    Instruction manual – Unique Single Seat Valve – Long stroke

    Instruction manual – Unique Single Seat Valve – ATEX Standard

    Instruction manual – Unique Single Seat Valve – Aseptic




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