Safety Valve

Safety Valve Manufacturer in Germany

Safety valves protect boilers, pressure vessels, pipelines and industrial equipment against excessive pressure. When system pressure reaches a predetermined set pressure, the valve opens automatically to release excess fluid. It closes once pressure falls to the specified reseating level.

Our manufacturing range includes industrial safety valves for steam, gas, vapour and liquid applications. Available configurations are suitable for power generation, oil and gas, petrochemical processing, industrial gas systems and general plant utilities.

Valve selection is based on the required relieving capacity, operating temperature, backpressure, process medium and applicable safety standards.

Types of Safety Valves

Our range includes conventional spring-loaded, balanced bellows, pilot-operated, full-lift, low-lift and steam safety valves.

Safety Valve Technical Specifications

Parameter	Technical Specification
Size Range	DN15–DN300 inlet sizes, depending on design
Pressure Rating	PN10–PN450 / ASME Class 150–2500
Set Pressure	Adjustable and calibrated within the selected spring or pilot range
Cast Carbon Steel Body	ASTM A216 WCB, WCC
Forged Carbon Steel Body	ASTM A105
Low-Temperature Steel Body	ASTM A352 LCB, LCC / ASTM A350 LF2
Alloy Steel Body	ASTM A217 WC6, WC9
Cast Stainless Steel Body	ASTM A351 CF8, CF8M, CF3, CF3M
Forged Stainless Steel Body	ASTM A182 F304, F304L, F316, F316L
Cast Iron / Ductile Iron Body	ASTM A126 Class B / ASTM A536 65-45-12, for applicable designs
Bronze Body	ASTM B62 C83600, for selected applications
Trim Materials	ASTM A276 Type 410, 304, 316; Stellite-faced options
Seat Design	Metal seated or soft seated, depending on service
End Connections	Flanged or threaded, depending on valve design
Service Media	Steam, gas, vapour and compatible liquids
Safety Valve Standards	EN ISO 4126-1 / EN ISO 4126-4, as applicable
API Standards	API 520, API 526 and API 527, as applicable
Equipment Codes	ASME Section I / Section VIII, as applicable
European Compliance	PED 2014/68/EU, where applicable

Specifications depend on the selected valve design and service conditions. Not all material, size and pressure-rating combinations are available for every model. Final pressure-temperature ratings, set-pressure limits and applicable certifications must be confirmed for the intended application.

Automatic Overpressure Protection

Safety valves operate independently of the normal process control system. In a direct spring-loaded design, a compressed spring holds the disc against the nozzle seat. As inlet pressure rises, the force acting on the disc increases until the valve reaches its specified opening condition.

The valve then releases the required amount of fluid to control the pressure increase. As system pressure falls to the reseating level, the closing mechanism returns the disc to its seat.

The opening response, discharge capacity and reseating characteristics depend on the valve construction and the requirements of the protected equipment.

Set Pressure, Relieving Performance and Sizing

Safety valve selection begins with the required relieving load. The valve must provide sufficient discharge capacity under the specified relief conditions while meeting the allowable pressure limits of the equipment.

The main pressure parameters include:

Parameter	Description
Set Pressure	The specified pressure at which the valve begins to open under the applicable test conditions.
Overpressure	The pressure increase above the valve’s set pressure during relief.
Accumulation	The pressure increase above the maximum allowable working pressure of the protected equipment.
Blowdown	The difference between set pressure and reseating pressure.

The following operating data is required for sizing and selection:

Sizing Parameter	Required Information
Relieving Capacity	Required mass or volumetric flow rate
Set Pressure	Specified opening pressure
Allowable Overpressure	Permitted pressure increase during relief
Relieving Temperature	Temperature at the specified relief conditions
Process Medium	Steam, gas, vapour or liquid
Fluid Properties	Molecular weight, density, compressibility and other relevant properties
Backpressure	Superimposed and built-up backpressure, as applicable
Discharge Coefficient	Applicable certified or rated coefficient
Orifice Area	Required effective discharge area

For gas and vapour service, sizing must account for compressible-flow behaviour. Liquid relief applications require appropriate fluid-property and backpressure calculations.

Where applicable, the calculated discharge area is used to select a standard API orifice designation. Final sizing and selection must comply with the governing equipment code and project requirements.

Safety Valve Industries and Applications

Industrial safety valves are installed wherever excessive pressure could damage equipment or compromise the integrity of a pressurised system.

Industry	Typical Applications
Oil and Gas	Pressure vessels, separators, compressors and process systems
Petrochemical	Reactors, heat exchangers and hydrocarbon processing equipment
Power Generation	Steam boilers, steam headers and auxiliary systems
Chemical Processing	Process vessels, reactors and chemical handling systems
Industrial Gas	Gas receivers, compressors and pressurised gas systems
Marine and Offshore	Boilers, pressure vessels and marine utility systems
Food and Pharmaceutical	Steam generators, process vessels and utility systems
General Manufacturing	Compressed air receivers, heating equipment and industrial pressure systems

Safety Valve Installation and Testing

Safety valves must be installed according to the applicable equipment code, project specification and manufacturer’s requirements.

The inlet piping should provide an adequate flow path without excessive pressure loss. The discharge arrangement must account for backpressure, reaction forces and the safe release or disposal of the relieved medium.

Inspection and testing may include set-pressure verification, seat leakage testing, visual and dimensional inspection, material certificate review, and nameplate verification. Capacity certification or additional performance testing may be required by the governing code.

Testing requirements and acceptance criteria are established according to the applicable safety standard and project specifications.