HDSL

HDSL Series decompression block

Construction Applications

Holmbury’s 3-Line decompression block offers the perfect easy connection solution for skid steer loader, track loader and compact wheel loader machines. Designed as a drop in replacement for the Faster 4BD4FH and 4BD4FI block assembly without any re-plumbing.
Connect Under Pressure TechConnect Under Pressure
Min Spill TechMin Spill
Carbon Steel Trivalent Materials

Features

  • Push activation feature allows simple decompression
  • Designed for use with standard 'off the shelf' ISO 16028 couplings
  • Coupling arrangement can be ordered in 1/2" (Size 12), 5/8" (Size 16) or 3/4" (Size 19)
  • Case drain coupling is standard 3/8" (Size 10) 
  • Alternative thread terminations available for rear ports

Accessories

  • Not applicable

Construction

  • Block body is anodised aluminium
  • Rear ports are carbon steel trivalent plating
  • Couplings are carbon steel with zinc nickel plating (1200 hours with no red rust in salt spray tests)
  • Supplied with Nitrile and Polyurethane seals with a back up ring in PTFE

Applications

  • Quick changeover of construction equipment attachments
  • Skid steer loaders
  • Track loaders
  • Excavators
  • Compact loaders
  • Utility vehicles

AVAILABLE SEALS AND TEMPERATURE RANGE

All carbon steel products have Nitrile Butadiene Rubber seals fitted as standard. All stainless steel products have Fluoro-elastomer Rubber (Viton®) seals fitted as standard. Special seal materials available on request.

106°C 223°F

Nitrile

120°C 248°F

EPDM

200°C 392°F

Viton®

300°C 572°F

Kalrez®

-20°C -4°F

Viton®

-25°C -13°F

Kalrez®

-40°C -40°F

Nitrile

-50°C -58°F

EPDM

Abbreviation Trade Name Chemical Name Min Temp. Max Temp.
NBR XNBR Chemigum®, Hycar8, Breon®, Butakon®, Butacril®, Buna-N®, Perbunan®, Paracril®, Krynac®, Europrene-N®, Nipol® Nitrile Butadiene Rubber Carboxylated Nitrile Rubber -40°C (-40°F) 106°C (223°F)
FKM (FPM) Dai-el®, Fluorel®, Tecnoflon®, Viton® Fluoro-elastomer Rubber -20°C (-4°F) 200°C (392°F)
EPR EPDM Buna-AP®, Dufral®, Epsyn®, Nordel®, Epcar8, Keltan®, Royalene®, Polysar-EPDM® Ethylene Propylene Copolymer Ethylene Propylene Terpolymer -50°C (-58°F) 120°C (248°F)
FVMQ Silastic 1S®, FSE® Fluorosilicone Rubber -65°C (-85°F) 170°C (338°F)
FFKM Perlast®, Kalrez®, Chemraz®, Kaflon® Perfluoroelastomer -25°C (-13°F) 300°C (572°F)