Besa – Series 240 Safety Valve DN20-400 PN16-40 / 3/4″-16″ ANSI 150-300Enquire Now

BRAND: BesaCATEGORY: Over Pressure Protection, Safety Valves,

Reliable Overpressure Protection for Industrial Service

The Besa Series 240 Safety Valve is a spring-loaded safety valve designed to protect pressure vessels, pipelines, and process equipment from overpressure conditions in air, gas, steam, and liquid services. Manufactured in accordance with EN 4126, the Series 240 is selected where certified pressure relief performance, stable operation, and long-term mechanical reliability are required in industrial duty.

The valve is based on a semi-full or full nozzle design, with precision-machined stainless-steel internals to ensure accurate opening pressure, controlled blowdown, and repeatable reseating. Body options include cast iron, carbon steel, or stainless steel, with variants available in thermoplastic-lined execution for corrosive media. The design allows operation across a wide pressure and temperature range while maintaining compliance with PED and ATEX requirements.

Series 240 safety valves are commonly installed in chemical plants, pulp & paper mills, petrochemical facilities, utilities, and general process industries, where dependable overpressure protection and certification are mandatory. Flanged EN and ANSI connections are available, and the range covers a broad selection of sizes and pressure classes to suit standardised plant layouts.

Key Benefits for Technicians, Engineers & Production Managers

Accurate overpressure protection — EN 4126-compliant nozzle geometry ensures predictable opening and stable discharge characteristics.
Regulatory compliance assured — PED and ATEX certification supports use in regulated pressure equipment installations.
Consistent reseating performance — precision-guided internals maintain tight closure after relief events.
Material compatibility with process media — multiple body and trim options allow matching to corrosive, clean, or utility services.
Reduced maintenance risk — robust mechanical construction limits wear under cyclic or continuous operation.
Simplified plant integration — standard EN and ANSI flanged connections suit existing piping systems.
Lifecycle support available locally — repair, testing, and spring-pressure calibration services support ongoing compliance.

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.

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Specifications

Series	240
Design	Spring loaded safety valve
Features	Spring-loaded safety valve design — provides automatic pressure relief without external power or instrumentation. Semi-full and full nozzle configurations — optimised flow capacity and stable discharge behaviour in accordance with EN 4126. Stainless-steel internal components — corrosion-resistant trim improves durability and pressure-setting stability. Multiple body material options — cast iron, carbon steel, or stainless steel bodies accommodate varied plant conditions. Flanged EN and ANSI connections — compatible with PN16–PN40 and ANSI Class 150–300 piping systems. Controlled blowdown characteristics — supports repeatable reseating and process stability after pressure relief. Closed bonnet options — protects the spring and internals from environmental exposure. Wide size and pressure range — suitable for small utility services through to large industrial installations.
Size Range	DN20x40 – DN250x400 3/4″x1″ – 10″x16″
Set Pressure	0,25bar – 40bar
Pressure Rating	PN 16 – 40 / ANSI 150 – 300 (ANSI 600 on some sizes)
Temperatures	-196°C to 537°C
End Connections	Flanged
Body Materials	Cast Iron / Carbon Steel / Stainless Steel
Disc Materials	ASTM 420 / EN 1.4028 (Other materials available)
Seat Materials	ASTM 316 / EN 1.4401
Standards	EN 4126-1 / EN 12516
Approvals	PED / ATEX / RINA / EAC / UKCA
Options & Accessories	Lifting Device Bellows Soft Seat Heating Jacket Test Gag Limit Switch Balanced Piston
Applications	Steam, vapors, gases and liquids in the chemical, pulp & paper, energy and processing industries as well as all industrial applications. Chemical plant vessels & piping General process industry Boiler and general steam LPG & LNG Heat exchangers Compressors Shipbuilding