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Technical Data

Material: Brass OT58 (body, valve, releasing sleeve), stainless steel AISI 301 (springs, elastic ring), stainless steel AISI 420 (spheres), NBR (seals).
Sizes and flow:
- 20 (DN 2.7): 6 mm², compact dimensions.
- 21 (DN 5): 20 mm², most commonly used size.
- 26 (DN 7.2): 40 mm², universal application.
Fluids: Compressed air, water, non-aggressive fluids.
Pressure range: 0–35 bar.
Vacuum: -99 kPa.
Temperature range: -20°C to +100°C.
Thread types:
- Metric: M5x0.8, M10x1, M12x1.5, M14x1.5, M16x1.5, M18x1.5 (DIN 13, DIN 2353, ISO 8434-1).
- BSP (parallel): G1/8″, G1/4″, G3/8″, G1/2″ (ISO 228).
Tube connections: Calibrated nylon (PA6), polyurethane (PU), rilsan (PA11) with internal diameters from 3 mm to 13 mm.
Configurations:
- Couplings (KA):
  - With male metric thread (AM, AD), male BSP thread (AW), female metric thread (IM), female BSP thread (IW).
  - With hose adapter (TF), rapid fitting (KO), bulkhead rapid fitting (KS), bulkhead hose adapter (TS), rapid fitting with anti-deviation spring (KK).
- Stems (SF):
  - With male metric thread (AM, AD), male BSP thread (AW), female metric thread (IM), female BSP thread (IW).
  - With hose adapter (TF), rapid fitting (KO), bulkhead rapid fitting (KS), bulkhead hose adapter (TS), rapid fitting with anti-deviation spring (KK).
Dimensions and weights: Depending on type and size (see catalog for details).

Flow diagram: At 6 bar with ΔP of 1 bar.

Quick-locking couplings

The API Quick-Lock Couplings provide a fast and secure connection for compressed air, water, and non-aggressive fluids. These couplings are made of unplated brass and use a ball mechanism for reliable sealing, even with frequent connections and disconnections. The series is divided into couplings (KA) and stems (SF), available in three sizes: 20 (DN 2.7), 21 (DN 5), and 26 (DN 7.2). Size 20 is compact and suitable for medical, pharmaceutical, and chemical applications, size 21 is the most common, and size 26 is considered “universal.” All couplings comply with Reach and RoHS directives and are suitable for pressures up to 35 bar and a temperature range of -20°C to +100°C.