The right valve, the safe close.
Size valves, PRVs and air valves, and tame surge and backflow. Built for hydraulic and plumbing designers.
Netafim 80 Series PRV
3″ PN10 · or Amiad / Dorot 100 Series
These figures come from the Tenselo engine. Every result Tenselo produces shows the inputs it used and the method behind it, so the work can be checked rather than taken on trust.
Why it matters on the job
Valve sized to flow
Body size from velocity, named to real product lines that interchange.
Cavitation kept low
Reduction ratio checked so the PRV doesn't chatter or erode.
Surge-safe closing
Close times worked over the downstream main so you don't slam the line.
9 Valves, PRVs & Backflow calculators
Every calculator in this category, by its reference code. Running them needs a Tenselo subscription — subscriptions open soon.
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VLV-001 Control Valve Cv / Kv Sizing
Liquid control/throttling valve: required Kv & Cv from flow and pressure drop, with a cavitation/choked-flow check
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VLV-002 Pressure Sustaining Valve
PSV / relief sizing: Bermad 730 & AVK 859, velocity + Kv + pilot
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VLV-003 PRV Selector
Flow + upstream/downstream pressure + control -> supplier PRV options
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VLV-004 Solenoid Valve Sizing
Zone valve picks by brand: flow, head loss, closing time, effluent
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VLV-005 Air Valve Selection
Size air-release / air & vacuum / combination valves for a pipe flow + diameter
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VLV-006 Backflow / RPZ Sizing
Hazard rating, device type & DN size with head loss, AU models + AS/NZS compliance
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VLV-007 Check Valve / NRV Selection
Velocity, head loss & slam-risk guidance for non-return valves (pump discharge / rising main)
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VLV-008 Pressure-Relief Valve Sizing (Liquid)
Required orifice area for a liquid relief valve (API 520 Part I) + the next standard API 526 orifice
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VLV-009 Water Column Separation
Air-valve sizing on pump trip -- required air flow + valve selection
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