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Foster Products



ZSi Products




Iso





3/8" One way Shutoff, 4 Series
Series 4, Industrial Interchange, 3/8" Plugs
Sizes and Pricing

Plugs
Female Thread
Sizes and Pricing

Plugs
Male Thread
Sizes and Pricing

Plugs, Free Swivel [1] Under Pressure
Male Thread
Sizes and Pricing

Plugs
Hose Stem
(Requires Hose Clamp)
Sizes and Pricing

Plugs
Push-On Hose Stem
Sizes and Pricing

Plugs
Reusable Hose Clamp
ID x OD

[1] Swivel Plugs - Eliminates hose twist on end drop applications such as blow guns, air tools, etc.

Series 4, Industrial Interchange, 3/8" 1-Way Man. Sockets
Sizes and Pricing

Man. Sockets
Female Thread
Sizes and Pricing

Man. Sockets
Male Thread
Sizes and Pricing

Man. Sockets
Hose Stem
(Requires Hose Clamp)
Sizes and Pricing

Man. Sockets
Push-On Hose Stem
Sizes and Pricing

Man. Sockets
Reusable Hose Clamp
ID x OD
Series 4, Industrial Interchange, 3/8" 1-Way Auto. Sockets
Sizes and Pricing

Auto. Sockets
Female Thread
Sizes and Pricing

Auto. Sockets
Male Thread
Sizes and Pricing

Auto. Sockets
Hose Stem
(Requires Hose Clamp)
Sizes and Pricing

Auto. Sockets
Push-On Hose Stem
Sizes and Pricing

Auto. Sockets
Reusable Hose Clamp
ID x OD
One Way Shut-Off - Series 2 thru 6
 
 

Type: One Way Shut-Off – Socket is valved, shutting off supply line at disconnect. Plug is un-valved, exhausting downstream line at disconnect. Install socket on pressure side of line.

Interchangeability: Standard industrial interchange design, most widely used in industry. 3 and 5 Series Automatic water service comply with A-A-59439 (formerly MIL-C-4109F). 3-4-5-6 SERIES MEET ISO 6150-B, ANSI(NFPA)T3.20.14-1990. IN ADDITION, SV SOCKETS MEET ISO 4414.

Rated Pressure:300 PSIG; Vacuum to 26"Hg (connected)
Contact Foster for higher pressure applications.

Manual: Socket sleeve must be manually retracted to connect and disconnect.

  • Low cost, general purpose coupler

  • Positive locking mechanism

  • 65% more ball retention

  • Precision leakproof seal and heavy steel sleeve.

Automatic: Inserting the plug into the socket automatically retracts the sleeve to connect. Manually retract the sleeve to disconnect.

  • One hand operation

  • One piece sleeve with rear crimp

  • Precision leakproof seal

  • Long wearing pin type locking mechanism

  • Greater plug contact

Connection Sizes:

  • 1/8" to 1" NPT

  • 1/4" to 1" Hose Barb (Hose clamp required. See Python hose clamps)

  • 1/4" to 1/2" Push-on Hose Barb (Clamps not required when used with Push-On Hose.)

Options:

  • Ball Lock (BL)– Locks manual socket against accidental disconnect.
    To connect, align ball with slot. After connection, rotate sleeve to lock.
    To disconnect, realign ball with slot and retract sleeve.

  • Sleeve Lock (SL) – Locks automatic socket against accidental disconnect. To connect, align notch with slot. After connection, rotate sleeve to lock. To disconnect, realign notch with slot and retract sleeve.


  • BALL CHECK PLUG – Eliminates hose whip at disconnect by checking the rapid flow of downstream exhaust air.

  • SWIVEL PLUGS – Free swivel under pressure. Eliminates hose twist on end drop applications such as blow guns, air tools, etc.

  • Optional Seal [Ordering]:
    Buna-N seal is standard. Alternate seals are specified by the appropriate suffix on the catalog number.
    For example, 3003 socket with Heat Adder is 3003H. Refer to sizes/pricing for appropriate part for list of seals available.

    Service Construction Seal Temperature Suffix
    Air, Vacuum,
    Grease & Oil
    Brass &
    Steel
    Buna-N -40° to +250°F none
    Water Brass &
    S/S
    Buna-N +32° to +100°F W
    Hot Water Brass &
    S/S
    Viton -40° to +400°F HW
    Steam Brass &
    S/S
    EPDM -40° to +250°F S
    Heat Brass &
    Steel
    Viton -40° to +400°F H
    Less Valve Brass &
    Steel
    Buna-N -40° to +250°F LV
    Note: Temperatures shown are seal compatibility.
    Consult factory for operational characteristics.

Features:

  • High flow capability for small coupler

  • Precision leak-proof seal

  • Positive locking mechanism

  • Sockets other than standard are color coded:
    Water (Blue), Steam (Black), and Heat (Red)

  • Foster 3 thru 6 Series couplers are designed for rigid mounting that allows a simple push-to-connect operation, constructed of a solid brass body and a steel valve.

  • "FM" Series are mechanically interchangeable with similar industrial interchange couplings made by other manufacturers and accept plugs that conform to MIL-C4109-F. Plugs used with the "FM" Series are the Industrial Interchange plugs. FM Series 3 and 5 couplers comply with A-A-59439.

Safety: To connect, insert plug and pull sleeve forward. To disconnect, push sleeve back while rotating first counter clockwise and then clockwise. As sleeve goes black, supply line is shut off, downstream line is exhausted, and plug is released. Remove plug.

  • 100% safety

  • Connect and disconnect at “0” pressure

  • Plug locked before air is turned on and downstream line is exhausted before plug is released, completely eliminating hose whip

  • Tested to 100,000 operations with no leakage

  • Special lubrication eliminates dry breakaway

  • Can be used as 3-Way on-off valve without disconnecting

Foster
Series
Body
Size
PSI Rated Pressure,
Coupled (Body/Sleeve)
Brass/
Steel
Brass/
Brass
Steel/
Steel
S.S./
S.S.
Series 2 1/8" 300* 300* n/a 300*
Series 3 1/4" 300* 300* 300 300*
Series 4 3/8" 300* 300 300 n/a
Series 5 1/2" 300* 300 300 n/a
Series 6 3/4" 300 300 300 n/a

Foster
Series
Body
Size
Pressure Drop
Air Flow-CFM
100 PSIG
Air Flow-CFM
80 PSIG
Water Flow
GPM 60 PSIG
10
PSIG
5
PSIG
10
PSIG
5
PSIG
10
PSIG
5
PSIG
Series 2 1/8" 16 12 14 11 1.8 1.2
Series 3 1/4" 36 26 33 24 3.7 2.5
Series 4 3/8" 68 50 62 45 6.8 5
Series 5 1/2" 118 90 107 82 11 8
Series 6 3/4" 190 135 172 122 22 16

Specifications Body Size
1/4" 3/8" 1/2" 3/4"
Rated Pressure (psi) 300 PSIG; vaccuum to 26" Hg
Temperature Range
(std seals)
-40° to +250° F
Locking Device 3 pawls 4 pawls 5 pawls 6 pawls
Vacuum Data
  -- Disconnected
(coupler only)
Not Recommended
  -- Connected 27.4 inches Hg
Approximate
CFM at 100 (psi)
37 70 150  

Performance: FM Series (1/4", 3/8", 1/2", 3/4")