Fill Limit Valves

Overview

FLVs are used to establish ullage (airspace) in the tank and help prevent overfilling. Perko FLVs connect to 5/8” hose. They are designed to vent to vented fuel fills and not directly to canisters. Mounting options for tank mounted ICVs include flanged (for plastic tanks), threaded or welded (for metal tanks) and swivel (for both plastic and metal tanks).

  • Flanged valves match the SAE 5-bolt level sender flange. Gasket is not included.

  • Threaded valves mount with a 1” NPTF thread.

  • Swivel valves include valve, valve housing, o-ring, snap ring and tank insert.

  • Distant sensing (DFLV) versions are available for both plastic and metal tanks on a custom basis.

  • Custom ullage set points are available. Contact the factory for details.

  • Fill Limit Valve - New Design

    Figure No. 0529

    Our new Fill Limit Valve (FLVV) reduces airflow restrictions and allows more make-up air to enter the system when high horsepower engines are running at wide open throttle. In some applications, this valve can also simplify system plumbing.

    Can be used to push refueling vapors through a canister.

    Note: For custom ullage depths, contact the factory.

    • Two Hose Barbs (5/16" & 5/8" Connections)
    • Three Standard Ullage Depths: 3/4", 1-1/8" and 1-1/2"
    • Manufactured from Corrosion Resistant Aluminum
    • Large Diameter 6-bolt Flange FLVV
    • Flange Diameter: 4-1/2"
    • Bolt Circle: 3-3/4"
    • Valve Body Diameter: 2-3/8"
    • Mounting Hole Diameter: 2-1/2"
    • Projection Above the Tank: 1-3/8"
    • Mounting Screw Size: #10
    Catalog No. Style Ullage Depth Height Overall Flange Diameter Projection Above Tank
    0529FV0034 Flanged 3/4" 4-1/2" 4-1/2" 1-3/8"
    0529FV0118 Flanged 1-1/8" 4-7/8" 4-1/2" 1-3/8"
    0529FV0112 Flanged 1-1/2" 5-1/4" 4-1/2" 1-3/8"

  • In-line Vent Hose Surge Protector

    Figure No. 0553

    Perko's patent pending in-line surge protector functions both as a fill limit valve assisting in pump auto shut-off and a check valve to prevent wellback in the vent line. Consult Perko for details on how to install the surge protector as a replacement for a fill limit valve.

    Note: Must be installed with 30° of vertical if vented.

    • Black and White Polymer Valve
    • Aluminum Surge Float
    • Prevents fuel surges and back splash during re-fueling
    • Fits in 5/8" fuel vent hose line
    Hose Connection Length Inches Dealer Pkg. 5 Pcs. 1 per Card OEM Bulk Pkg. 25 Pcs. Carton Ship Wt. Lbs. DP/OEM Bulk
    5/8 1-9/16 0553DP0 0553000 0.8/2.0 lbs.

  • Swivel Fill Limit Valves

    Figure No. 0586S
    • Machined Aluminum
    • Blue Polymer Valve
    • Standard ullage depths range from 3/8" to 1-1/2"
    • Vents large volume of vapor from inside the fuel tank while refueling.
    • Prevents overfilling of the fuel tank.
    • Sets the ullage space.
    • Directs fuel vapors to carbon canister through a vent tube.
    • Provides vapor back flow to prevent tank vacuum.
    • Prevents liquid carryover (fuel leakage) during boat maneuvers.

    Technical Information

    • For use in aluminum tanks
    • Angle/Port - 90°
    • Width - 2"
    • Projection - 1-1/4"
    • Mounting Hole Diameter - 1-3/4"
    • Hose Connection - 5/8"
    • Flow > 70 l/min @ 0.25kPa
    • Flow without corking > 130 l/min
    • Minimum reopening pressure: 0.5 kPa
    OEM Bulk Pkg. 10 Pcs. Length Inches Collar Ullage Size Inches Certified Fire Tested Shipping Weight Lbs.
    0586S0A038 3-23/32 Yes 3/8 Yes 4.0
    0586S0A012 3-27/32 Yes 1/2 Yes 4.0
    0586S0A034 4-3/32 Yes 3/4 Yes 4.2
    0586S0A118 4-15/32 Yes 1-1/8 Yes 4.8
    0586S0A112 4-27/32 Yes 1-1/2 Yes 5.5

  • Flanged Fill Limit Valves

    Figure No. 0586F
    • Machined Aluminum
    • Blue Polymer Valve
    • Standard ullage depths range from 3/8" to 1-1/2"
    • Matches the SAE 5-bolt level sender flange.
    • Gasket is not included.
    • Vents large volume of vapor from inside the fuel tank while refueling.
    • Prevents overfilling of the fuel tank.
    • Sets the ullage space.
    • Directs fuel vapors to carbon canister through a vent tube.
    • Provides vapor back flow to prevent tank vacuum.
    • Prevents liquid carryover (fuel leakage) during boat maneuvers.

    Technical Information

    • For use in aluminum and plastic tanks
    • Angle/Port - 90°
    • Width - 2-3/4"
    • Projection - 1-1/16"
    • Bolt Circle - 2-1/8"
    • Mounting Hole Diameter - 1-1/2"
    • Hose Connection - 5/8"
    • Flow > 70 l/min @ 0.25kPa
    • Flow without corking > 130 l/min
    • Minimum reopening pressure: 0.5 kPa
    OEM Bulk Pkg. 10 Pcs. Length Inches Collar Ullage Size Inches Certified Fire Tested Shipping Weight Lbs.
    0586F00038 3-17/32 No 3/8 Yes 3.5
    0586F00012 3-21/32 No 1/2 Yes 3.5
    0586F00034 3-29/32 No 3/4 Yes 3.8
    0586F00118 4-9/32 No 1-1/8 Yes 4.4
    0586F00112 4-21/32 No 1-1/2 Yes 4.8

  • NPTF Threaded Fill Limit Valve

    Figure No. 0586T
    • Machined Aluminum
    • Blue Polymer Valve
    • Standard ullage depths range from 3/8" to 1-1/2"
    • Vents large volume of vapor from inside the fuel tank while refueling.
    • Prevents overfilling of the fuel tank.
    • Sets the ullage space.
    • Directs fuel vapors to carbon canister through a vent tube.
    • Provides vapor back flow to prevent tank vacuum.
    • Prevents liquid carryover (fuel leakage) during boat maneuvers.

    Technical Information

    • For use in metal tanks
    • Angle/Port - 90°
    • Width - 1-5/16"
    • Projection - 1-1/4"
    • Mounting Hole Diameter - 1" NPTF
    • Hose Connection - 5/8"
    • Flow > 70 l/min @ 0.25kPa
    • Flow without corking > 130 l/min
    • Minimum reopening pressure: 0.5 kPa
    OEM Bulk Pkg. 10 Pcs. Length Inches Collar Ullage Size Inches Certified Fire Tested Shipping Weight Lbs.
    0586T00038 3-31/32 No 3/8 Yes 2.6
    0586T00034 4-11/32 No 3/4 Yes 2.9
    0586T00118 4-23/32 No 1-1/8 Yes 3.4
    0586T00112 5-3/32 No 1-1/2 Yes 4.1