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All Categories > Check Valves and Flow Limiting Devices > Item # 684  
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Item # 684, 684 High Flow Check Valve

List Price $58.00

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High flow one-way or check valve.
  • Check valve
  • High flow
  • 1/2 in. NPT


Series Designation

684 Series


Check Valve

Special Features

Check Valve
High Flow

Maximum Rated Pressure

6000 psi

Inlet Port Size

1/2 in. MNPT

Outlet Port Size

1/2 in. FMNPT

Outlet Pressure Rating

6000 psi

Flow Coefficient (Cv)

0.55 (0.28 in. orifice)


Bubble Tight

Minimum Temperature

-15 ºF

Body Material

Anodized Aluminum

Internal Materials


Seal Materials



140 g

Overall Length

2.6 Inch

Hex Diameter

1 3/8 Inch

Repair Kit/Service Items


Special Notes

Open pressure: 3 to 8 psi


Model 684 Check Valve Operation & Maintenance Manual
(PDF, 5KB)

Technical Bulletin
(DOC, 126KB)

 Repair Kit for 684 High Flow Check Valve 

Repair Kits
Repair Kit for 684

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