Alfa Laval LKB Hygienic Butterfly Valve

Alfa Laval LKB hygienic butterfly valve: in-line shutoff and routing

The Alfa Laval LKB is a hygienic butterfly valve for routing low- and medium-viscosity liquids in stainless-steel pipe systems. A large opening area and low flow resistance give it a high Kv value and a small pressure drop, so it is a common choice where simple on/off flow control is needed at reasonable cost. Seven Star LLC supplies the LKB in Oman and the GCC as an independent supplier in Muscat.

The LKB is a modular range. Body connection (including a flange version), handle or actuator, and feedback units are all selected per order, so the part code is built up from these choices. We therefore ask for the application details first and confirm the exact configuration in the quotation.

LKB butterfly valve specifications

How the LKB butterfly valve works

A disc on a shaft rotates through 90° inside the body. Open, the disc lies along the flow and leaves a wide passage; closed, it presses on the seal ring and shuts the line. With a pneumatic actuator, axial piston travel is converted into the 90° shaft rotation. The torque rises as the disc meets the seal ring, which secures proper seating.

With a manual handle, the operator turns the shaft by hand and the handle mechanically locks the position. A regulating 90° handle allows a part-open setting, while a multi-position handle gives repeatable intermediate positions. An indication unit can be added to feed the open/closed state back to a panel or PLC.

LKB compatibility and family context

Alfa Laval offers the LKB as the general hygienic butterfly valve and the LKB UltraPure for high-purity duty with Q-doc documentation. If you have both types in your project, check which duty each line carries. The ThinkTop V50 and V70 units fit on top of the butterfly valve, and their pulse-seat-clean function is intended to reduce energy, water and cleaning chemical costs. Related valves in the same range include the Unique DV-ST diaphragm valve and single-seat valves.

Selection checklist for the LKB

• Pipe size, tube standard and body connection, including whether the flange version is preferred for easier servicing.
• Fluid viscosity (low to medium) and solids content.
• Seal ring and elastomer material suited to the fluid, temperature and cleaning chemicals.
• Manual with the correct handle type, or pneumatic with NC, NO or A/A.
• Feedback: none, indicator, ThinkTop V50 or V70.
• Hygienic standard or UltraPure documentation.
• Available compressed-air pressure at the valve.

Installation and maintenance of the LKB

Fit the valve so that the disc can swing clear of neighbouring fittings and so that the seal ring is not stressed by misaligned pipework. Alfa Laval presents the construction as space-saving, which suits in-line mounting between pipe sections. After commissioning, run through open and close cycles with the actuator and confirm the feedback signals.

Service is meant to be quick: the manufacturer highlights that a single long-life component is replaced, without special tools, which limits downtime. Keep a seal-ring kit per size in stock and replace the ring on an interval based on cleaning frequency and temperature, since CIP chemicals and steam are the usual wear drivers. For the flange version, parts can be reached without cutting the line.

Typical applications in Oman and the GCC

The manufacturer names the dairy, food, beverage and brewery industries. In the region, these translate to dairy and laban producers, juice and water bottlers, and food factories where large product lines need a simple, hygienic shutoff. Butterfly valves are also practical for CIP supply and return headers on skids, where flow resistance matters. Warm ambient conditions raise CIP temperature loads on elastomers, so confirm the seal material for your duty.

LKB operating options

Information to send with your LKB RFQ

A complete request avoids back-and-forth and lets us quote the right configuration the first time.

• Pipe size, tube standard and connection type, with the flange option if wanted.
• Fluid, viscosity, temperature and cleaning regime.
• Manual (handle type) or pneumatic (NC, NO, A/A).
• Seal ring material and any hygiene or documentation requirement.
• Feedback or control unit and the control voltage.
• Quantity and delivery location in Oman or the GCC.

Documents and quotation

Send us the part number LKB and the intended duty, and we will confirm which official documents are available for it. If you have the existing Alfa Laval order code from a valve already installed, include it so we can match the replacement exactly.

Seven Star LLC is an independent industrial supplier in Muscat serving Oman and the GCC. We quote against the configuration you give us and revert with lead time and availability.