American Engineering Trusted Worldwide
American Engineering Trusted Wordwide ®DATA SHEET
581-4
11/16/2025 11:16 PM
| Product Category | 581-4 |
| Product Line | O-SEAL® Stop-Check Valves (500 Series) |
| Part Description | 3/4" Angle Stop-Check Valve with O-SEAL® Ends |
Dimensions
| Port Dia. | 0.63 |
| A | 2.310 |
| B | 5.69 |
| C | 2.38 |
| E | 5.25 |
| F-THREAD | 2.000"-12UN |
| Lift | 0.56 |
General
| Pressure Rating | 6000 PSI |
| Temperature Range | -15°F to 275°F (-26°C to 135°C) |
| Standard Soft Goods | [-G] Polyurethane® Packing and Viton® O-Rings |
| Cartridge Type | Stop-Check |
| Connection Type | O-SEAL® Union Thread |
| Connection Size | 3/4" |
| Body Material | Nickel Aluminum Bronze, ASTM B148, UNS C95800 |
| Bonnet Material | Nickel Aluminum Bronze, ASTM B150, UNS C63200 |
Options
| [-VC] Vacuum Service | Option to add additional softgoods for internal vacuum service. |
| [-P] Panel Mount | Option to add external thread and panel mounting nut to bonnet |
| 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 |