Industrial valves

Valve types we manufacture

KTN manufactures six valve families and completes the line with automation, instrumentation and pipeline accessories.

• Ball valves: quarter-turn isolation in 1, 2 and 3-piece bodies, full or reduced bore, 3-way L/T port, soft PTFE or metal seats, plus the PFA lined KTN 123T series.
• Butterfly valves: wafer, lug and double flanged bodies, EPDM, NBR, viton or PTFE liners, disc in stainless steel, ductile iron or aluminium bronze.
• Globe valves: throttling duty in class 800 forged steel to API 602 and in cast steel.
• Gate valves: full isolation with solid or flexible wedge, rising (OS&Y) or non-rising stem, API 600 and API 602 design.
• Check valves: non-return protection in piston, swing and dual plate wafer designs to API 594 and API 6D.
• Control valves: needle and high-pressure valves for fine flow and pressure regulation.
• Valve automation: single and double acting pneumatic actuators, electric actuators, NAMUR 3/2 and 5/2 solenoid valves and ATEX limit switch boxes.
• Instrumentation: bimetallic thermometers from −80 °C to +550 °C, stainless Bourdon tube gauges and pressure transmitters.
• Industrial accessories: Y strainers, expansion joints, sight glasses and safety spray shields for flanges.

Materials and seats

KTN machines bodies in AISI 316 and 316L stainless steel, WCB carbon steel, A105 and F316 forged steel, bronze, PVC and PP, plus PFA and PTFE lined executions for corrosive media such as the KTN 123T lined ball valve. Seat selection follows temperature and fluid aggressiveness: PTFE and reinforced PTFE for general service, pentafite for demanding duty, EPDM, silicone and NBR in elastomer, and lapped metal-to-metal for class VI shut-off to ANSI/FCI 70-2. Food contact ranges ship in 316L with an Ra 0.8 µm polish, abrasive ranges with stellite hard facing.

End connections and standards

KTN supplies BSP thread (ISO 228 and EN 10226), NPT thread (ASME B1.20.1), socket weld and butt weld ends (ASME B16.11 and B16.25), ANSI B16.5 class 150-300 flanges, DIN EN 1092-1 PN10-PN40 flanges, wafer and lug bodies, double flanged bodies and sanitary clamp ends. Designs follow API 600 and 602 for gate valves, API 6D and 594 for check valves, API 609 for butterfly valves and API 607 or 6FA for fire-safe service. The ISO 5211 top flange takes an actuator without adaptors; ISO 15848 fugitive emission certification on request. Use the KTN DN to inches conversion table and the guide to flange face types.

How to select an industrial valve

Selection always follows this order of decision.

• Duty: on/off isolation (ball, butterfly, gate), throttling (globe, control) or non-return.
• End connection: thread in small bore, ANSI or DIN flange for maintenance access, welded ends for high pressure, wafer or clamp when space or hygiene rules.
• Material: 316 stainless for corrosion, WCB carbon steel for general service, forged steel for high pressure and temperature, PFA lining for acids.
• Pressure and temperature: PN10-PN40, class 150-300 or class 800, with the seat as the real thermal limit.
• Seat: PTFE for general service, elastomer for water and air, metal-to-metal for zero leakage and abrasion.
• Automation: confirm operating torque to size the actuator on the ISO 5211 interface.

Applications and industries

KTN supplies industrial valves to petrochemical, chemical, oil & gas, power, steam and thermal oil, water treatment and desalination, food and beverage, pharmaceutical, cosmetics, pulp and paper, mining, marine and HVAC plants. Each industry sets its own material and certification: 316L with Ra 0.8 µm polish for food contact, API 607 fire-safe for hydrocarbons and PFA lining for acids.

Buying industrial valves direct from the factory

Buying direct from the manufacturer removes the distributor margin and gives full material traceability. KTN keeps the most common materials and sizes in stock for immediate despatch, issues a certificate of origin with every order and manufactures special executions to drawing. Price depends on size, material, pressure class, end connection and seat. Send fluid, pressure, temperature and line size and the technical team confirms model and lead time. Distributor enquiries from new markets are welcome.

Why KTN

KTN Valves (Kara Technology News, S.L.) is a manufacturer based in Rubí, Barcelona, producing in its own facilities under an ISO 9001 quality system with Bureau Veritas inspection. Every order carries a certificate of origin and, on request, a 3.1 material certificate. Controlling design, material, machining and testing in house allows KTN to build to drawing and to standardise components across European and American standards. KTN is appointing distributors in France, the United Kingdom, Poland, Vietnam and Egypt.

Related categories

Complete the line with valve automation, pressure and temperature instrumentation and industrial accessories: Y strainers, expansion joints, sight glasses rated to 230 °C and safety spray shields.

Frequently asked questions

Which industrial valves does KTN manufacture?

KTN manufactures ball, butterfly, globe, gate, check and control valves in BSP and NPT thread, ANSI and DIN flanges, welded ends, wafer, lug and sanitary clamp. The range is completed with pneumatic and electric actuators, pressure and temperature instrumentation, and pipeline accessories such as strainers, expansion joints and sight glasses.

Is KTN a valve manufacturer or a distributor?

KTN Valves is a manufacturer. It produces in its own facilities in Rubí, Barcelona, under an ISO 9001 quality system with Bureau Veritas inspection, and controls design, material, machining and testing. It also builds special executions to customer drawing and issues a certificate of origin with every order.

Which valve should I use for throttling and which for isolation?

Use a globe or a control valve for throttling, because the closure member approaches the seat progressively and holds a stable flow. Use ball, butterfly or gate valves for isolation. Throttling with a gate valve erodes the seat and causes disc vibration, so it should only run fully open or fully closed.

What materials and certificates does KTN supply?

AISI 316 and 316L stainless steel, WCB carbon steel, A105 and F316 forged steel, bronze, PVC, PP and PFA or PTFE lined executions. Every order includes a certificate of origin. On request KTN issues a 3.1 material certificate and Bureau Veritas inspection, plus fugitive emission certification to ISO 15848.

Are industrial valves held in stock for immediate despatch?

KTN holds the most common materials and sizes of each family in stock for immediate despatch. Special executions, valves built to drawing and materials outside the standard range are confirmed with a specific lead time when the offer is prepared, together with price and quality documentation.

Request a quotation

Send valve family, size, material, end connection, pressure and service temperature and KTN will prepare a manufacturer quotation with price and lead time. Request a quotation and the technical team will review the specification with you.