Home > Product > Ball Valve > Buying Guide for Ball Valves > Factors to Consider When Buying a Ball Valve
Choosing the right ball valve is a critical investment decision that directly impacts your system efficiency, safety, maintenance cost, and productivity. At Perfect Engineers, we help procurement managers, engineers, OEMs, and EPC contractors make the right choice by highlighting all the key factors to consider before buying a ball valve—be it for water, gas, steam, chemicals, food, pharma, oil, or industrial automation.
Let’s break down the top considerations that go beyond just price and size.
Understand what will flow through the valve:
Valve sizes typically range from ¼” to 24”. Ensure the valve matches your pipe OD and pressure drop requirements.
Always check the operating pressure and temperature of your system. Our valves are rated from:
For high-pressure steam, thermal oil, or flammable service, choose metal seats, graphite seals, and fire-safe certifications
Pick the right connection to suit your piping layout:
| Connection Type | Best Used In |
| Threaded (BSP/NPT) | Domestic, HVAC, small bore lines |
| Flanged (ANSI/DIN) | Industrial, high-pressure pipelines |
| Socket / Butt Weld | Permanent high-temp or buried lines |
| Clamp End (TC) | Food, dairy, pharma clean lines |
| Compression/Ferrule | Instrumentation tubing, gas analyzers |
| Valve Part | Options | Use Case |
| Body | WCB, SS304/316, PVC, Brass | Depends on corrosion, pressure, cost |
| Ball | SS316, Brass, PTFE-coated | Anti-corrosive and sealing performance |
| Stem | Blowout-proof SS or CS | For safety and strength |
| Seats | PTFE, RPTFE, Graphite, Metal | For leak-proof sealing under all conditions |
| Seals/O-rings | EPDM, Viton, Silicone, NBR | Match with fluid type and temp |
Ensure your valve complies with:
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| Need | Suggested Feature |
| Fire risk or gas lines | API 607 fire-safe valve |
| Modulating or remote flow control | Electric or pneumatic actuator |
| Clean-in-place (CIP/SIP) | Clamp end SS316L with PTFE seats |
| Corrosive slurry or abrasive media | Metal-seated ball valve with hard coating |
| Safety shut-off or emergency stops | Spring-return handle or fail-safe actuator |
Yes, but check material compatibility if the air contains oil or moisture.
Use full bore for minimal pressure drop or pigging. Reduced bore works for standard shut-off.
A stem that won’t eject under pressure, even if the handle is removed—ensures safety.
Yes—choose a valve with an ISO 5211 mounting pad, and you can retrofit actuators anytime.
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