VERY LOW-PRESSURE SAFETY VALVE
EF1415LP
- Very low set-pressure range from 5 to 200 mbar
- High-capacity flanged design for large relieving flows
- Tank, storage-system and industrial process protection
Applications
Configured Service Scope
ATEX / Hazardous Area
Chemical
Oil & Gas
Petrochemical
Water
Key Specifications
NOMINAL SIZESDN25 to DN400 (1” to 16”)
SET PRESSURE RANGE5 to 200 mbar
TEMPERATURE RANGE-96°C to +350°C
DESIGN STANDARDSAPI RP 520 / API STD 526 / ASME Section VIII / EN 4126 / EN 12516
MATERIALSCarbon Steel A216 WCB / Stainless Steel 1.4409 or A351 CF3M
CONNECTIONSFlanged EN / ASME B16.5
FLANGE RATINGSPN16 / ASME Class 150
TESTING & COMPLIANCEEN 4126-1/7 / API STD 527 / MSS-SP-55
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FAQs
The EF1415LP is a spring-loaded pressure safety valve designed for very low set-pressure overpressure protection in industrial process systems. It is intended for applications requiring set pressures below the practical operating range of many conventional spring-loaded safety valves.
A low-pressure safety valve provides overpressure protection at set pressures below the practical operating range of many conventional safety valves. The EF1415LP is specifically intended for set pressures from 5 to 200 mbar, subject to the selected configuration and process conditions.
The published set pressure range is 5 to 200 mbar. The exact available range should be confirmed against the selected size, configuration and process conditions.
The EF1415LP is specifically designed for very low set-pressure service, where a conventional spring-loaded PSV may not be appropriate. Its configuration provides overpressure protection for low-pressure systems while retaining a spring-loaded safety-valve design.
ABOUT EF1415LP
The EF1415LP pressure safety valve is a spring-loaded, flanged valve designed specifically for very low set pressures from 5 to 200 mbar. It protects tanks, storage systems and industrial process equipment where many conventional spring-loaded safety valves do not provide the required operating range.
Its high discharge capacity is particularly useful for low-pressure gas and vapour duties, where the volumetric flow to be relieved can require a comparatively large valve. The published range covers inlet sizes from DN25 to DN400 (1 to 16 inches).
The EF1415LP is available with PN16 or ASME B16.5 Class 150 flanges. Published body materials include carbon steel A216 WCB and stainless steel 1.4409 or A351 CF3M.
Calculation and design references include API RP 520, API STD 526, ASME Section VIII, EN 4126 and EN 12516. Final selection must be based on set pressure, relieving capacity, fluid, temperature, backpressure, flange standard and project requirements.
Frequently Asked Questions
The EF1415LP is a spring-loaded pressure safety valve designed for very low set-pressure overpressure protection in industrial process systems. It is intended for applications requiring set pressures below the practical operating range of many conventional spring-loaded safety valves.
A low-pressure safety valve provides overpressure protection at set pressures below the practical operating range of many conventional safety valves. The EF1415LP is specifically intended for set pressures from 5 to 200 mbar, subject to the selected configuration and process conditions.
The published set pressure range is 5 to 200 mbar. The exact available range should be confirmed against the selected size, configuration and process conditions.
The EF1415LP is specifically designed for very low set-pressure service, where a conventional spring-loaded PSV may not be appropriate. Its configuration provides overpressure protection for low-pressure systems while retaining a spring-loaded safety-valve design.
At low relieving pressures, gases and vapours can have a relatively low density, so the volumetric flow to be discharged may be large. Some applications therefore require a comparatively large relieving area and valve size. Final sizing must always be based on the actual relieving capacity and process conditions.
The EF1415LP can be considered for compatible steam, gases, vapours and liquids where the required set pressure and selected valve configuration suit the service. Final suitability should be confirmed from the fluid, relieving case, temperature, backpressure and project requirements.
Yes. It can be considered for tank and storage-system overpressure protection where a spring-loaded low-pressure safety valve is appropriate. The actual set pressure, required capacity and discharge conditions must be reviewed before final selection.
Yes. It can be considered for low-pressure gas or vapour relief duties where the process conditions and required set pressure fall within its applicable range. Final sizing should consider fluid properties, relieving temperature, required capacity and backpressure.
Yes. It can be considered for low-pressure steam duties where the valve configuration, set pressure and relieving conditions are suitable. Final selection must be based on the actual steam conditions and required relieving capacity.
Yes, where lower-pressure downstream equipment requires protection against a credible overpressure scenario caused by failure or malfunction of a pressure-reducing system. The relief case and required capacity must be established from the actual process conditions.
The EF1415LP is a spring-loaded pressure safety valve for overpressure protection. A pressure/vacuum relief valve protects tanks against both positive pressure and vacuum. The correct device depends on the equipment, set pressure, relieving scenario and whether vacuum protection is required.
No. The EF1415LP is intended for overpressure protection. Where vacuum protection is required, a dedicated pressure/vacuum relief solution should be evaluated separately.
No. The valve must be sized according to the required relieving capacity and process conditions, not simply by matching the pipeline diameter. In very low-pressure applications, the required relieving area may lead to relatively large valve sizes.
The published range covers inlet sizes from DN25 to DN400, or 1 to 16 inches depending on the flange standard and configuration. The final size must be determined from the required relieving capacity and installation conditions.
Published body materials include carbon steel A216 WCB and stainless steel 1.4409 or A351 CF3M. Material selection must consider the fluid, temperature, corrosion requirements and project specification.
The EF1415LP is supplied with flanged connections in PN16 or ASME B16.5 Class 150 configurations. The required flange standard and inlet and outlet sizes should be confirmed during selection.
The published temperature range is -96°C to +350°C. The allowable temperature for the final valve must be confirmed for the selected body, seat, gasket and configuration.
Published overpressure values are 10% for steam, gas and vapour, 20% for fire exposure and 25% for liquid thermal relief. Typical blowdown is 7%. The applicable values must be confirmed for the selected service and governing code.
Normally required information includes:
- Set pressure
- Required relieving capacity
- Fluid
- Relieving pressure and temperature
- Fluid properties, where applicable
- Inlet conditions
- Backpressure or discharge conditions
- Applicable design code
- Required connection size and flange standard
These data are needed to review the valve configuration and relieving capacity.
Delivery time depends on the selected size, material, configuration and project requirements. Large sizes and specific inspection or documentation requirements may require additional manufacturing time. The applicable lead time is confirmed with each quotation.
Yes. Inspection and testing can be arranged according to the agreed project scope, together with the applicable technical documentation and certification. EFSVALVES can also support export packaging, logistics and international delivery coordination.
Yes. The EF1415LP can be considered for EPC and project-managed applications where process data, sizing conditions, materials, flange requirements, inspection and documentation requirements are defined during the RFQ stage. Final configuration must be confirmed against the project specification and actual process conditions.