Xurox industrial butterfly valves and flow control equipment

Xurox industrial butterfly valves: wafer, lug, and double-flanged models DN 32 to 1200, elastomer liners in EPDM, NBR, Viton, PTFE lining, and ISO 5211 actuators.

Xurox Wafer series concentric butterfly valves for pipeline installation

Xurox Wafer butterfly valves operate between pipeline counter-flanges across nominal diameters from DN 32 to DN 1200. The concentric geometry featuring a monolithic body and through-shaft delivers dependable disc alignment and bubble-tight shutoff under differential pressures up to 16 bar.

Nominal bore diameters spanning DN 32 to DN 1200 suited for varied industrial media
Flange drilling compatibility conforming to DIN PN 6/10/16, ANSI Class 150, and JIS
Centering lugs integrated into the body perimeter for accurate pipeline alignment
Standardized top mounting flange compliant with ISO 5211 for direct actuation

Xurox Lug series threaded butterfly valves for end-of-line isolation

Xurox Lug butterfly valves incorporate threaded perimeter lugs drilled to metric or imperial standards. This structural layout enables both inline mounting and dead-end pipeline isolation, allowing maintenance technicians to service adjacent equipment without draining upstream pipeline fluid.

Threaded lugs enabling secure bolting directly between opposing pipeline flanges
Safe unilateral pipe detachment under full line pressure during shutdown servicing
Valve bodies produced from ductile iron, carbon steel, and stainless steel grades
Standardized face-to-face dimensions compliant with ISO 5752 and EN 558 series 20

Xurox Bridas double-flanged butterfly valves for large transmission mains

Xurox double-flanged butterfly valves serve heavy transmission pipelines, municipal pumping stations, and desalination plants from DN 150 to DN 1200. Dual integrated flanges simplify hoisting heavy valve assemblies and eliminate twisting strain across flanged joint faces during bolt torquing.

Diameter envelope from DN 150 to DN 1200 for municipal and industrial conduits
Dual integrally formed flanges matching international bolting pattern dimensions
Streamlined disc profile minimizing hydrodynamic turbulence and head pressure loss
Comprehensive factory hydraulic pressure testing of each valve body at PN times 1.5

Xurox elastomer seat liners and replacement sealing sleeves

To tailor Xurox valves to process fluid chemistry and operating temperatures, the manufacturer formulates more than 30 specialized elastomer compounds. Interchangeable sleeves wrap the internal body bore entirely, isolating metallic body structures from corrosive pipeline fluids.

EPDM liners tailored for potable water, low-pressure steam, and cooling loops
NBR synthetic elastomer sleeves resistant to mineral oils and hydrocarbons
FKM Viton fluoroelastomers serving chemical lines at temperatures up to 200 °C
Specialty Flucast, Hypalon, and epichlorohydrin liners handling abrasive slurries

Xurox PTFE lined and metal-to-metal seating butterfly valves

For aggressive chemical process conduits, Xurox supplies valves lined with inert fluoropolymer PTFE. For high-temperature flue gases reaching 400 °C and abrasive particulate streams, the factory manufactures Metal-to-Metal valves configured with finely matched alloy seating rings.

Virgin PTFE body liners and disc encapsulation for acids and alkaline chemicals
Sanitary compliance suitable for pharmaceutical and beverage processing plants
Metal-to-metal configuration designed for exhaust gas ducting and foundries
Operating temperature envelope for metal seats spanning minus 20 to plus 400 °C

Xurox valve actuators, drive linkages, replacement discs, and shafts

The factory equips butterfly valves with manual notch levers, worm gearboxes, pneumatic double-acting actuators, and quarter-turn electric actuators. For scheduled overhauls, engineers supply replacement discs in AISI 316 stainless steel, machined shafts in 17-4PH alloy, and bushing kits.

Pneumatic rack and pinion actuators conforming to standard NAMUR interfaces
Quarter-turn electric actuators equipped with position transmitter feedback units
Machined replacement discs cast from AISI 316 stainless steel and aluminum bronze
High-strength valve shafts formed from AISI 420, 17-4PH, Monel, and Super Duplex

Spanish manufacturing heritage and COVALMA engineering background

Spanish engineering enterprise COVALMA, S.L., situated within the industrial perimeter of Madrid in Valdemoro, has specialized since 1996 in designing and fabricating quarter-turn butterfly valves under the Xurox brand.

The manufacturing plant incorporates dedicated machining facilities, elastomer vulcanization bays, and automated pressure testing stands.

Xurox flow control equipment reaches international destinations across marine shipbuilding, offshore desalination plants, municipal water treatment, steelworks, and chemical processing facilities.

All valve models adhere to European standard EN 593 and the Pressure Equipment Directive PED 2014/68/EU with complete hydrostatic testing across production.

Engineering advantages of concentric Wafer butterfly valve architecture

Wafer butterfly valves produced by Xurox deliver a compact concentric flow shutoff and throttling solution within a monolithic ductile iron or stainless body.

The architecture incorporates a continuous solid drive shaft that transmits rotational torque directly to the disc without radial play, providing uniform peripheral contact against the resilient seat.

The symmetrical disc contour minimizes fluid resistance and yields high flow coefficients Kv during fully open pipeline operation.

Outer perimeter alignment tabs guarantee precise centering between opposing flanges conforming to DIN PN 10/16 or ANSI Class 150 without pinching the elastomer collar during bolt makeup.

Operational utility and dead-end capabilities of Xurox Lug valves

For pipeline sectors requiring routine maintenance or isolated line disconnection without draining full piping headers, Xurox engineered the Lug butterfly series.

Full-bodied threaded perimeter lugs allow operators to bolt pipeline flanges on either side independently, ensuring mechanical stability during plant maintenance.

This layout permits Xurox Lug valves to serve as dependable dead-end terminal isolation barriers capable of withstanding differential pressure drops up to 16 bar.

Valve bodies manufactured from nodular ductile iron or stainless alloys exhibit elevated fracture toughness against water hammer pulses in technical conduit networks.

Elastomer seat selection criteria tailored for industrial fluids

Valve endurance and sealing integrity rely upon matching internal resilient liners to chemical fluid composition and temperature conditions.

Xurox formulates more than 30 specialized elastomer grades spanning operating temperatures from minus 40 to plus 200 °C, offering resistance to abrasive slurries, mineral oils, steam, and corrosive fluids.

General-purpose EPDM serves hot and cold water headers, brine, and plant fire protection loops; synthetic NBR handles hydrocarbon refining and fuel logistics; fluorocarbon FKM Viton provides resistance for concentrated chemical reagents; while Flucast and Hypalon provide durability within mining slurry conduits.

Severe service designs featuring PTFE lining and metal-to-metal seating

For demanding operating regimes where standard elastomers suffer rapid chemical breakdown, Xurox supplies specialized valve configurations.

Models featuring a fully encapsulated PTFE body liner and matching fluoropolymer disc provide chemical neutrality toward concentrated acids, solvents, and alkaline solutions in chemical processing.

For high-temperature flue gases, furnace exhaust ducts, and superheated ventilation handling temperatures reaching 400 °C, Xurox supplies Metal-to-Metal valves.

Precision machining and lapping of matched alloy seats and disc edges deliver reliable shutoff without organic polymers and avoid binding from thermal expansion.

Pneumatic and electric actuation automation compliant with ISO 5211

The top actuator mounting platform across Xurox butterfly valves conforms to standard ISO 5211 dimensions, enabling direct coupling with various driver mechanisms without custom adapter plates.

Valves accept multi-position manual lock levers, worm gearboxes with handwheels, alongside pneumatic and electric drivers.

Pneumatic rack-and-pinion actuators in double-acting and spring-return configurations integrate standard NAMUR interfaces for mounting pilot solenoid valves, limit switch feedback enclosures, and 4-20 mA positioners.

Electric actuators feature explosion-proof enclosures and declutchable manual handwheels for plant power loss scenarios.

Xurox and model names are trademarks of their respective owners and are used only to identify the equipment for which we source parts. SpareX is not an official dealer, distributor or representative of Xurox and is not affiliated with the trademark owner. Origin, documents and warranty are stated for each item in the quotation.