Butterfly Valves

LPB14 High Performance Butterfly Valve

A split-shaft, concentric butterfly valve that eliminates the traditional through-bore design to deliver a cleaner flow path, lighter disc assembly, and effortless in-line maintenance—purpose-built for high-flow and modulating service. These valves excel in demanding applications where corrosion resistance, abrasion tolerance, and zero-leakage compliance are non-negotiable. Available in both wafer and lugged end connections.

Product Description

Engineered around a split-shaft architecture, this centerline resilient-seated butterfly valve eliminates the traditional through-shaft design by employing independent upper and lower stem segments connected directly to the disc. This configuration removes the shaft bore through the disc body, resulting in a cleaner flow path, reduced pressure drop, and a lighter overall assembly. The vulcanized elastomer seat—bonded to the valve body—provides dependable bubble-tight shutoff in both flow directions, while the disc-to-shaft interface is precision-machined for positive, backlash-free torque transmission. Ideal for water and wastewater treatment, HVAC systems, fire protection networks, and general industrial service where frequent throttling and on-off duty are required, the two-piece shaft design also simplifies field maintenance: either stem segment can be accessed and replaced without removing the valve from the pipeline.

Key Features

Split-shaft (two-piece stem) construction – Upper and lower stems engage the disc independently, eliminating the through-bore and reducing disc weight by up to 20 % compared to conventional one-piece shaft designs.
Unobstructed flow path – With no shaft passing through the disc, the full port opening is maintained, minimizing turbulence and head loss in open position.
Vulcanized-in-place resilient seat – EPDM, NBR, or FKM elastomer is permanently bonded to the body, ensuring zero leakage at the seat-to-body interface and extending service life under cyclic duty.
Bi-directional, bubble-tight shutoff – Rated to API 598 / EN 12266-1 Rate A with zero visible leakage in either flow direction.
Low operating torque – The concentric disc geometry combined with the split-shaft pivot reduces friction at the seat contact, cutting actuator sizing requirements.
Field-serviceable stems – Top and bottom stem segments can be individually inspected, re-packed, or replaced in-line, significantly reducing downtime.
Multiple end connections – Available in wafer, semi-lug, and full-lug styles to suit ANSI, DIN, JIS, and BS flange standards.
Broad material options – Ductile iron, stainless steel (CF8/CF8M), and aluminum bronze discs; PTFE or UHMW-PE disc edge coatings available for abrasive or corrosive media.
Actuator-ready platform – ISO 5211 mounting pad accepts manual levers, gear operators, pneumatic, and electric actuators without adaptation kits.

Typical Applications

Water & wastewater treatment – Intake screening, aeration basins, sludge transfer, and effluent discharge lines where frequent cycling and zero-leakage compliance are mandatory.
HVAC & district energy – Chilled-water and hot-water distribution loops in commercial towers, hospitals, and campus plants requiring low-torque, high-cycle isolation.
Fire protection systems – Sprinkler mains, deluge lines, and hydrant manifolds demanding full-lug, UL/FM-listed configurations with fail-safe actuation.
Cooling-tower & condenser circuits – Large-diameter recirculation lines benefiting from the reduced head loss of the unobstructed port.
Irrigation & desalination – Seawater intake and RO pretreatment piping where aluminum bronze discs and FKM seats resist chloride attack.
General industrial process – Compressed-air headers, glycol loops, and low-pressure chemical transfer where a lightweight, maintenance-friendly valve reduces installation and lifecycle costs.

Specifications

Valve Size:
NPS2 - NPS96;
DN50 - DN2400
Pressure Class:
ASME Class 150;
DIN PN10, PN16, PN25
Operating Temperature:
-29 to +160 °C / -20 to +320 °F
Process Connection Type:
Wafer, Lugged
Valve Bonnet:
Standard, Heating Extension, Cooling Extension
Stem Seal:
O-ring
Seat Leakage:
Soft seating Class VI-Bubble tight (Zero Leakage)
Flow Characteristics:
Linear
Critical Service:
Noise Abatement, Dirty Service, Steam Condition, Erosive, Low Flow, Corrosive, General Service, Outgassing, Flashing
Valve Actuator:
Electric, Hydraulic, Pneumatic, Lever, Gear, Electro-Hydraulic
Valve Accessories:
Pneumatic Positioner, Electro Pneumatic Positioner, Limit Switch, SOV, Air lock relay, Volume Booster, AFR, Position Transmitter
Certifications:
PED, ATEX, SIL capable
Media:
Specialty Gases, Liquids, Air, Inert Gas, Water, Air
Other Configurations:
Contact your local Lapar business partner or sales office to learn about additional specifications or options for this product.