Description
Hansen LL3K21VAA Quick Disconnect Plug – 3HK (ISO 7241-1 Series B)
The Hansen LL3K21VAA is a dependable 3/8" hydraulic plug coupling from the proven 3HK, built for demanding hydraulic and fluid transfer systems where corrosion resistance, washdown durability, and broad fluid compatibility matter. Its rugged 303 stainless steel construction supports long service life, while ISO 7241-1 Series B interchange helps maintain compatibility across manufacturers.
As part of the original quick-coupling line invented by Fred Hansen in 1915, the HK Series remains a trusted standard for interchangeability, secure connection, and hydraulic performance in corrosive service environments.
Specifications
- Connection Type: 3/8-18 NPTF x ISO-B Plug
- Valve Style: 2-way shut-off, self-sealing poppet
- Material: 303 stainless steel body with stainless-steel springs and locking balls
- Seal: Nitrile (NBR) standard
- Temperature Range*: -40 °F to +250 °F (-40 °C to +121 °C) with NBR
- Interchange: ISO 7241-1 Series B (HK Series)
- Max Operating Pressure: 255 bar (3,700 psi)
- Rated Flow: 23 lpm (6 gpm)
- Nominal Flow Diameter: 7.8 mm
- Air Inclusion (max): 2.9 cc
- Fluid Loss (max): 2.1 cc
- Configuration: valve actuator
*Temperature range depends on seal material.
Key Features
- Proven Hansen HK design based on the original quick-coupling concept.
- ISO-B interchange for compatibility across manufacturers.
- Self-sealing poppet helps minimize fluid loss during disconnection.
- 303 stainless construction supports corrosion resistance in chemical, marine, and washdown service.
Applications
- Chemical processing and corrosive fluid transfer
- Washdown and sanitary-adjacent industrial equipment
- Marine and harsh-environment hydraulic systems
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