Besa – Series 290 Safety Valve / API 526 1″-10″Enquire Now

BRAND: BesaCATEGORY: Over Pressure Protection, Safety Valves,

Reliable Overpressure Protection for API 526 Duty

The Besa 290 API safety valve is a spring-loaded pressure relief valve designed to protect pressurised equipment against overpressure in steam, gas and liquid services. It is built in accordance with API 526 and uses an adjusting ring to tune opening and reseat behaviour, which is important where stable lift, repeatable blowdown and controlled closing are required across changing process conditions.

For typical plant duties, the Besa 290 is supplied in flanged patterns with high-flow, full-nozzle construction and a defined performance basis aligned to API sizing practice (API RP 520 basis is referenced in the 290 technical bulletin flow-rate notes). The published operating characteristics for the 290 series include effective discharge coefficients (Kd) for gas/vapour and liquid service and standard overpressure and blowdown expectations used during sizing and selection.

Key Benefits for Technicians, Engineers & Production Managers

Fewer nuisance lifts — the adjusting ring allows set-up of stable popping and closing behaviour for consistent relief performance.
More predictable capacity sizing — published Kd values support repeatable engineering calculations for gas/vapour and liquid duty.
Clear protection margins — defined overpressure basis (gas/vapour vs liquid) supports compliance with typical relief design assumptions.
Controlled return to service — defined blowdown expectations help avoid extended loss of product or unstable reseating after a lift event.
Simpler plant standardisation — one API-pattern valve family covers steam, gases and liquids, reducing spares variety across units.
Improved maintainability planning — optional accessories such as test gag and limit switch support functional checks and lift indication where required.
Material fit for duty — availability of carbon steel and stainless steel constructions supports common refinery, chemical and utility services.

Our Valve Repair Centres in Secunda and Durban provide expert valve repair, reconditioning, automation, and testing services ensuring that your Besa Safety Valves remain in peak condition.

Supported in South Africa by Valve & Automation.

Download the Besa 290 Technical Bulletin

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Specifications

Series	290
Design	Spring loaded safety valve
Features	Fewer nuisance lifts — the adjusting ring allows set-up of stable popping and closing behaviour for consistent relief performance. More predictable capacity sizing — published Kd values support repeatable engineering calculations for gas/vapour and liquid duty. Clear protection margins — defined overpressure basis (gas/vapour vs liquid) supports compliance with typical relief design assumptions. Controlled return to service — defined blowdown expectations help avoid extended loss of product or unstable reseating after a lift event. Simpler plant standardisation — one API-pattern valve family covers steam, gases and liquids, reducing spares variety across units. Improved maintainability planning — optional accessories such as test gag and limit switch support functional checks and lift indication where required.
Size Range	1″x1 1/2″ – 8″x10″ Orifice D to T
Set Pressure	0,5bar – 300bar
Pressure Rating	Class 150 – 2500
Temperatures	-196°C to 538°C
End Connections	Flanged ASME B16.5
Body Materials	A216 WCB (1.0619) / A351 CF8M (1.4408) / A217 WC6 (1.7357)
Disc Materials	ASTM 316 / EN 1.4401
Seat Materials	ASTM 316 / EN 1.4401
Standards	API 520 / API 526 / API 527
Approvals	PED / ATEX / EAC / UKCA
Options & Accessories	NACE Conformity Lifting Device Bellows Damper Soft Seat Test Gag Limit Switch Piston EN DIN Flanges
Applications	Steam, vapors, gases and liquids in following industries, Oil & gas (On and offshore) Petrochemical Refineries Tank farms Skids for oil transfer