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Industriearmaturen 3 Way Ball Valves

3-Way Ball Valve in Stainless Steel & Brass — L- and T-Port, Ex Stock

3-way ball valves in stainless steel 1.4408 or brass CW617N, with L-port for switching or T-port for mixing and distribution, DN15 to DN100, PN25 to PN63, PTFE seat, hand lever, pneumatic or electric actuation.

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3 Way Ball Valves
Product Overview

3-Way Ball Valve: L- and T-Port for Switching, Mixing and Distribution

A 3-way ball valve diverts the media stream between three ports, mixes two streams into one or distributes one stream to two outlets. A ball with L- or T-shaped bore rotates 90 degrees and switches the flow paths in seconds. One valve therefore replaces up to three classic 2-way shut-offs and saves installation space, weight and maintenance effort in HVAC mixing loops, dosing systems, process pipework and sampling systems.

Fergo supplies five 3-way ball valve series for industrial service. The KL103 / KT103 in stainless steel 1.4408 (CF8M / AISI 316) with ISO 7-1 threaded ends covers DN15 to DN50 at PN63. The KL100 / KT100 in brass CW617N with BSP threaded ends to ISO 228-1 delivers the economical option for HVAC and plumbing-adjacent duty at PN25. The KL112 / KT112 adds the flanged variant to EN 1092-1 from DN15 to DN100 in PN10, PN16 and PN40. The KL105 / KT105 reduces the face-to-face length to EN 558-1 series 27 for tight installations in stainless steel 1.4401 or cast steel ASTM A105. For aggressive chemistry the AMP3 by Flowserve Atomac carries a full PFA lining on a GGG40.3 body.

3-way ball valves serve chemical and pharmaceutical plants, food and beverage production, HVAC and refrigeration, water treatment, dosing systems and heat-exchanger changeover circuits. For pure shut-off without diverting duty, the threaded ball valve and flanged ball valve ranges deliver the correct alternative.

Design and Application

01 3-Way Ball Valves by Design and Application

01 — Stainless Steel 3-Way Ball Valve (KL103 / KT103)

The stainless steel range KL103 (L-port) and KT103 (T-port) uses body, ball and stem in 1.4408. The ISO 7-1 threaded connection allows fast fitting into existing pipework. The PTFE + 15 % glass fibre seat raises wear resistance and reduces cold flow under sustained pressure. Fergo recommends the series for chemistry, pharma, food processing and corrosive media up to PN63.

02 — Brass 3-Way Ball Valve (KL100 / KT100)

The brass range KL100 / KT100 uses a CW617N body with BSP threaded ends to ISO 228-1. The series fits HVAC mixing loops, heating systems, plumbing and cold-water circuits up to PN25. Low weight and economical unit cost make the KL100 the standard choice for building services.

03 — Flanged 3-Way Ball Valve (KL112 / KT112)

The KL112 / KT112 transfers the L- or T-port principle to a standardised flanged connection to EN 1092-1. This design covers larger nominal sizes up to DN100 and pressure ratings up to PN40. The flanged connection simplifies removal for maintenance and inspection. The ISO 5211 actuator interface allows the direct mounting of quarter-turn actuators.

04 — Compact 3-Way Ball Valve (KL105 / KT105)

The KL105 / KT105 reduces the face-to-face length to EN 558-1 series 27 for installation in tight pipe sections. The compact construction in stainless steel 1.4401 or cast steel ASTM A105 covers DN15 to DN100 at PN16 and PN40. Typical service includes skid units, decentralised dosing stations and retrofit installations.

05 — PFA-Lined 3-Way Ball Valve (AMP3 Flowserve Atomac)

The AMP3 by Flowserve Atomac carries a full PFA lining on a GGG40.3 body. The ball with L- or T-port is likewise PFA-lined, the seat rings are PTFE. This construction withstands concentrated acids, strong caustics, solvents and high-purity media in chemical and pharmaceutical service. Every variant appears on the PFA valves overview.

Materials in Detail — Body, Ball and Seat

Body and Ball Materials

1. Stainless Steel 1.4408 (CF8M / AISI 316) — KL103, KL112

  • Application: chemistry, pharma, food processing, water treatment, chloride-rich media, hygienic service
  • Temperature: −25 °C to +180 °C with PTFE + 15 % GF seat
  • Advantages: corrosion resistance in acidic, alkaline and saline media, high media purity, PN63 covers high-pressure duty
  • Limitations: higher unit cost than brass; not resistant to hydrofluoric acid

2. Brass CW617N — KL100

  • Application: heating, plumbing, HVAC mixing loops, cold water, compressed air, neutral media
  • Temperature: −15 °C to +150 °C · PN25
  • Advantages: good corrosion resistance in neutral media, fast fitting via BSP threaded ends, low weight, economical
  • Limitations: not suitable for strong acids, solvents or service above 150 °C

3. Stainless Steel 1.4401 / Cast Steel ASTM A105 — KL105 Compact

  • Application: skid units, dosing systems, retrofit in tight pipe sections
  • Temperature: −29 °C to +200 °C depending on grade · PN16, PN40
  • Advantages: reduced face-to-face length to EN 558-1 series 27, direct actuator mounting to ISO 5211
  • Limitations: cast steel without intrinsic corrosion resistance; for aggressive media choose the stainless variant

4. GGG40.3 with PFA Lining — AMP3 Flowserve Atomac

  • Application: concentrated acids, strong caustics, halogens, solvents, high-purity media in chemistry and pharma
  • Temperature: −20 °C to +200 °C
  • Advantages: near-universal chemical resistance, no metal ion migration, robust cast body carries the PFA lining
  • Limitations: sensitive to abrasive solids and mechanical impact; special build

Seat Materials

1. PTFE + 15 % Glass Fibre — Standard on KL103 / KT103 (Stainless Steel)

  • Application: chemistry, pharma, corrosive media up to PN63
  • Temperature: −25 °C to +180 °C
  • Advantages: glass-fibre reinforcement raises compressive strength and form stability, minimises cold flow under sustained pressure
  • Limitations: lower elasticity than pure PTFE; not for highly abrasive media

2. Pure PTFE — Standard on KL100 / KT100 (Brass) and AMP3 Seat Rings

  • Application: neutral media, water, compressed air, HVAC loops, aggressive chemistry in AMP3 combination
  • Temperature: −15 °C to +150 °C
  • Advantages: near-universal chemical inertness, low friction coefficient, bubble-tight shut-off
  • Limitations: wear part; regular inspection recommended depending on cycle count

3-Way Ball Valve Series at a Glance

Series Body Connection DN PN
KL103 / KT103 Stainless steel 1.4408 (CF8M / AISI 316) Threaded ISO 7-1 DN15–DN50 PN63
KL100 / KT100 Brass CW617N BSP threaded ISO 228-1 DN15–DN50 PN25
KL112 / KT112 Stainless steel 1.4408 Flanged EN 1092-1 DN15–DN100 PN10, PN16, PN40
KL105 / KT105 Stainless steel 1.4401 / Cast steel ASTM A105 Flanged, compact face-to-face EN 558-1 series 27 DN15–DN100 PN16, PN40
AMP3 (Flowserve Atomac) GGG40.3 + PFA lining Flanged EN 1092-2, ANSI 150 DN25–DN150 PN10, PN16

L-Port vs T-Port Comparison Table

Criterion L-port T-port
Function Switching between 2 outlets Mixing, distribution, recirculation
Simultaneous connection 2 ports 2 or 3 ports
Typical service Changeover, bypass, sampling, heat-exchanger switching HVAC mixing, temperature control, dosing, distribution
3rd port shut-off Yes, by design No
Modulating control No Yes, with positioner
Fergo series KL103, KL100, KL112, KL105 KT103, KT100, KT112, KT105

Actuation — Hand Lever, Pneumatic or Electric

Every 3-way ball valve from Fergo carries the standardised ISO 5211 actuator interface. This means each series takes retrofit automation without any body modification.

Pneumatic 3-Way Ball Valve

For pneumatic automation, Fergo mounts a double-acting (DA) or single-acting spring-return actuator (SR NC / SR NO) directly onto the ISO 5211 interface. The complete actuator unit, including NAMUR solenoid, limit switch box and positioner, is pre-assembled and tested in-house. Every variant appears on the pneumatic ball valves page.

Electric 3-Way Ball Valve

The electric 3-way ball valve combines the KL103, KL113, KL112 or KL105 series with the J4C electric actuator in a multi-voltage design: 24 V, 230 V or 400 V AC/DC. The J4C delivers torque from 20 to 300 Nm and rotates 90° in 13 seconds (±10 %). Every variant appears on the electric ball valves page.

Hand Lever and Gearbox

The hand lever covers DN15 to DN50. From DN65 upwards, Fergo fits a worm gearbox on request for reduced operating torque. A mechanical indicator on the stem shows the switching position directly.

Certificates & Standards for 3-Way Ball Valves

Fergo 3-way ball valves comply with the Pressure Equipment Directive 2014/68/EU and carry the CE mark. The stainless steel versions follow EN 17292 for industrial ball valves. Threaded connections follow ISO 7-1 (EN 10226-1) for tapered pipe threads and ISO 228-1 for BSP threads. Flange connections follow DIN EN 1092-1 and EN 1092-2, face-to-face lengths EN 558-1, actuator mounting flanges ISO 5211.

Inspection documents to EN 10204 — type 2.2 works certificate or type 3.1 inspection certificate — are available on request. All certificates are published on the Certificates page. You can verify media compatibility beforehand using the Resistance check.

Buy 3-Way Ball Valves — Ex Stock Neuss, Delivery Across Europe

Fergo carries 3-way ball valves in the KL103, KL100, KL112, KL105 and AMP3 series directly from stock in Neuss, Germany. Standard delivery via DHL runs 2 to 7 working days to the United Kingdom, the Nordic countries and the rest of the European Union. Smaller sizes travel by parcel service, heavier flanged valves by forwarding agent. Express shipping is available.

For project-specific requirements — pre-assembled actuator packages, custom port configurations, DN200+ nominal sizes, 3.1 material certificates or special alloys such as Hastelloy or duplex — Fergo engineers custom designs. Requests run through the custom solution page. The technical team supports every enquiry from specification to delivery.