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Valves / Check / 681-6

1.25" Angle Check Valve with O-SEAL® Ends

Data sheet
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American Engineering Trusted Wordwide ®

DATA SHEET

681-6
11/17/2025 1:28 AM

Product Category 681-6
Product Line O-SEAL® Check Valves (600 Series)
Part Description 1.25" Angle Check Valve with O-SEAL® Ends

Dimensions

Port Dia. 1
A 3.250
B 3.81
C 3.00
C-THREAD 2.750"-12UN

General

Pressure Rating 6000 PSI
Temperature Range -15°F to 275°F (-26°C to 135°C)
Standard Soft Goods [-C] Viton® O-Rings
Cartridge Type Check
Connection Type O-SEAL® Union Thread
Connection Size 1.25"
Body Material Nickel Aluminum Bronze, ASTM B148, UNS C95800
Bonnet Material Nickel Aluminum Bronze, ASTM B148, UNS C95800

Options

Port & Vent Options [-PA] Port Above Seat (1/4" NPT), [-PB] Port Below Seat (1/4" NPT), '[-VA] Vent Above Seat (1/2"-13 SAE), [-VB] Vent Below Seat (1/2"-13 SAE),
Optional Soft Goods [-B] Polyurethane® Packing and Buna-N O-Rings, [-C] Viton® Packing & O-Rings, [-D] EPDM Packing & O-Rings

cpvmfg.com | 484.731.4010

The complete catalog contents must be reviewed to ensure that the system designer and user make a safe product selection. When selecting products, the total system design must be considered to ensure safe, trouble-free performance. Function, material compatibility, adequate ratings, proper installation, operation, and maintenance are the responsibilities of the system designer and user. Caution: Do not mix or interchange valve components with those of other manufacturers.