Hytrex^® Self Seal "336" filter cartridges are designed for use where geologic formation protection is important and rapid filter change-out is required. The 336 cartridges feature an integral self sealing spring thermally-welded to the filter cartridge. Everything - cartridge filter, seal and spring - is 100% polypropylene.

Self Seal 336 cartridges fit all 336 and 436 type filter vessels and replace "Sock-Type" filters manufactured by Peco, Baldwin, Flo-Line and others.

Hytrex standard and Self Seal 336 cartridges are widely used in such oil field applications as:

• Secondary Recovery Systems
• Water and Steam Floods
• Completion Fluids
• Workover Fluids
• Feedwater
• Waste Water Disposal

• Ease of changeout - one piece construction
• 100% positive seal - no bypass
• Ease of sealing - includes integral welded spring, no troublesome metal spring and cup assemblies
• Pure materials - 100% polypropylene, no adhesives
• Oil field proven - improved economic value
• Better protection of the formation - precise micron ratings
• Longer life - true graded density media
• Higher dirt-holding capacity - solids trapped throughout media
• Large local inventory to respond to "upset" conditions
• Overall length - 36 inch (914 mm)
• Outside diameter - 2.75 inch (70 mm)
• Inside diameter - 1.375 inch (35 mm)
• Spring length - 2.625 inch (67 mm)
• Material of construction - 100% polypropylene
• Micron ratings available - 1,3,5,10,20,30,50,75
• 20 filters per carton - weight 28 to 38 lb per carton (depending on micron rating)
• Chemical compatibility -very wide; see Hytrex Chemical Resistance Guide