DE-S-IIC
High Velocity Pressure Relief Valve deflagration- and endurance burning-proof
Features
Pop-Open Characteristic
from the Lowest Pressure Increase up to Full Lift
Extreme Tightness
Resulting in Lowest Possible Product Losses and Reduced Environmental Pollution
Optimal Pressure Maintenance
Set Pressure Close to Opening Pressure for Optimum Pressure Maintenance in the System
Protective System According to ATEX
can Be Used as a Protective System in Areas With Potentially Explosive Atmosphere in Accordance With ATEX
Safety Against Endurance Burning
Protection against Atmospheric Deflagration and Endurance Burning
Flow Capacity
Optimized Flow Capacity
Suitable for Marine and Inland Tankers
Specially Developed for Sea Going Vessels but Also Useful for Inland Navigation Vessels and On Shore Systems
Permanent Magnets
Controlled by Corrosion-Resistant Control Valve (Pilot Valve), Low-Temperature-Resistant Permanent Magnet
Function and Description
High-Speed Pressure Relief Valve
The
Deflagration
Deflagration
Explosion propagating at subsonic velocity (EN 1127-1:1997).
-Proof
Pressure/vacuum relief valve
Pressure/vacuum relief valve is an umbrella term that includes pressure or vacuum relief valve as well as pressure and vacuum relief valve.
and Endurance-Burning-Proof PROTEGO® DE-S type
device
Device
A device is a pipe component that influences the media flow by opening, closing, or partially shutting off the flow channel or by dividing or mixing the media flow.
is a state of the art high velocity vent valve working on the principle of a dynamic
Flame Arrester
Flame arrester
Device fitted to the opening of an enclosure, or to the connecting pipe work of a system of enclosures, and whose intended function is to allow flow but prevent the transmission of a flame.
. It is primarily used as a device for flame transmission proof venting of cargo spaces and loading systems of tankships during the loading process and on the journey. The valve offers reliable protection against excess pressure, prevents
product
Product
Includes equipment, protective systems, devices, components and combinations of these.
losses almost up to the
set pressure
Set pressure
Set pressure is the gauge pressure at the device inlet at which the relief device is set to start opening under service conditions.
and provides protection against atmospheric deflagrations as well as
endurance burning
Endurance burning
Stabilized burning for an unlimited time.
if
stabilized burning
Stabilized burning
Steady burning of a flame stabilized at, or close to the flame arrester element.
occurs. The PROTEGO® DE-S high velocity vent valve is available for substances of
explosion
Explosion
Abrupt oxidation or decomposition reaction producing an increase in temperature, pressure, or in both simultaneously.
group IIC (NEC group B MESG < 0,50 mm).
Jump Characteristic
The valve cone (1) is kept in a closed position by a corrosion resistant permanent magnet (2). The set pressure is adjusted by the distance of the permanent magnet to its counterpart (3). Upon reaching the set pressure, the valve opens directly to a full
lift
Lift
Lift is the actual travel of the valve pallet from the main valve out of the closed position.
with only a minor pressure rise (jump characteristic). The et pressure is therefore very close to the maximum allowable working pressure (MAWP) of the cargo space.
Advanced Manufacturing Technology
The
tank pressure
Tank pressure
Tank pressure is the pressure within a tank.
is maintained up to the set pressure with a tightness that is far superior to the conventional standard due to our state of the art manufacturing technology. This feature is ensured by valve seats made of high-quality stainless steel with an individually lapped valve cone. After the excess pressure is discharged, the valve reseats and provides a tight
seal
Seal
A seal prevents or limits unwanted transfer of product from one container to another. Seal is used as superordinate term for all types of sealing elements.
. The design of the valve cone and
valve seat
Valve seat
The valve seat is a component on which the valve pallet rests when the valve is closed.
produces a vertical, free jet that transports the gases far away from the discharge opening. This keeps the deck free of gas.
Safety of the High-Speed Pressure Relief Valve
This keeps the deck free of gas. The shape of the valve cone and valve seat promotes the drainage of rainwater when closed. A function check of the valve is easily performed with a manual lift gear (4) which returns to its initial position after actuation. A lateral flange connection, DN2, is standard for a
vacuum
Vacuum
Vacuum is the pressure in an enclosed space that is lower than the ambient pressure.
valve (such as the PROTEGO® SV/E-S, see volume 7). If the set pressure is exceeded, explosive gas/product-vapour air mixtures are released to the atmosphere. When reaching the
adjusted set pressure
Adjusted set pressure
Adjusted set pressure is the pressure at which a valve opens on a test bench.
, the velocity at which the mixtures exit the valve cone gap (5) (the gap between the valve seat and the valve cone) is much higher than the flame velocity.
Prevention of Flame Flashback
If this mixture ignites,
flashback
Flashback
Phenomenon occurring in a flammable mixture of air and gas when the local velocity of the combustible mixture becomes less than the flame velocity, causing the flame to travel back to the point of mixture.
into the tank is prevented. If the mixture flow continues, the dynamic flame arresting feature prevents flashback ignition even in the case of endurance burning. As the system pressure decreases, the discharge velocity at the valve cone gap decreases also. The design ensures, that even in the closing pressure range, the valve cone closes in a timely manner keeping the discharge velocity far above the flame velocity and thereby preventing flashback.
Tested Against Oscillating Flow
The PROTEGO® DE-S-IIC
high velocity pressure relief valve
High-velocity pressure relief valve
A high-velocity pressure relief valve is designed to have nominal flow velocities that exceed the flame velocity of the explosive mixture, thus preventing flame transmission.
is also approved for oscillating flow. A pipe of length no longer than the maximum tested length may be installed between the cargo space and the valve.The design is therefore a function of the required flow capacity. The design for explosion group IIC (NEC group B) is only available with a lift of 10 mm.
The maximum pipe length between the valve and the tank must be observed:
DN 80/3" and 100/4" = 5 m / 16.404 ft
DN 125/5" and 150/6" =7 m / 22.965 ft
Many Individual Certifications
The valve can be used at an
operating temperature
Operating temperature
Temperature reached when the equipment is operating under design conditions.
up to +60°C / 140°°F; since the valve is approved for group IIC (NEC group B MESG < 0,50 mm) vapours, it also meets the requirements of European Marine
Equipment
Equipment
Machines, appliances, fixed or mobile devices, control parts and accessories, and warning and prevention systems, whether separate or combined, intended for the generation, transfer, storage, measurement, control, and conversion of energy, and for the processing of materials, which have their own potential source of ignition and may cause an explosion.
Directive (MED). EU conformity according to the currently valid ATEX directive. Approvals according to other national/international regulations on request.
Product Data
Dimensions
To select the nominal size Nominal size The nominal size is an alphanumeric designation of size for components in a piping system, used for reference purposes, comprising the letters DN followed by a dimensionless integer that is indirectly related to the physical size of the bore or outside diameter of the connections, expessed in millimeters. (DN), please use the flow capacity chart on the following page
| DE-S-IIC with closed lateral connection DN 2 | ||||
| DN 1 | 80 / 3" | 100 / 4" | 150 / 6" | |
| a | 515 / 20.28 | 515 / 20.28 | 515 / 20.28 | |
| b | 195 / 7.68 | 195 / 7.68 | 195 / 7.68 | |
| c | 220 / 8.66 | 220 / 8.66 | 220 / 8.66 | |
| d | 120 / 4.72 | 120 / 4.72 | 120 / 4.72 | |
| e1 | 145 / 5.71 | 145 / 5.71 | 145 / 5.71 | |
| DE-S-IIC with lateral connection for vacuum relief valve Vacuum relief valve A vacuum relief valve is used to ventilate a part of the system and protects it from impermissible underpressure. DN 2 | ||||
| DN 1 | 80 / 3" | 100 / 4" | 150 / 6" | 150 / 6" |
| DN 2 | 80 / 3" | 80 / 3" | 80 / 3" | 150 / 6" |
| a | 515 / 20.28 | 515 / 20.28 | 515 / 20.28 | 515 / 20.28 |
| b | 195 / 7.68 | 195 / 7.68 | 195 / 7.68 | 195 / 7.68 |
| c | 220 / 8.66 | 220 / 8.66 | 220 / 8.66 | 220 / 8.66 |
| d | 120 / 4.72 | 120 / 4.72 | 120 / 4.72 | 120 / 4.72 |
| e2 | 100 / 3.94 | 100 / 3.94 | 100 / 3.94 | 100 / 3.94 |
Dimensions in mm / inches
The maximum pipe length between the valve and the tank must be observed:
DN 80/3" and 100/4" = 5 m / 16.404 ft
DN 125/5" and 150/6" =7 m / 22.965 ft
Selection of explosion group
| MESG | Expl. Gr. (IEC / CEN) | Gas Group (NEC) |
| < 0,50 mm | IIC | B |
Special approvals upon request
Material selection
| Design | A | B | C |
| Housing Housing A housing is a solid shell, which surrounds a content, either protecting the content from external influences, or protecting the environment from the content. | Steel | Stainless Steel | Hastelloy |
| Valve seat | Stainless Steel | Stainless Steel | Hastelloy |
| Valve cone | Stainless Steel | Stainless Steel | Hastelloy |
| Bellow | PTFE | PTFE | PTFE |
| Gasket | PTFE | PTFE | PTFE |
Special materials upon request
Flange connection type
| EN 1092-1; Form B1 |
| ASME B16.5 CL 150 R.F. |
other types upon request
Flow Capacity Chart
The flow capacity charts have been determined with a calibrated and TÜV certified flow capacity test rig. Volume flow V in (m³/h) and CFH refer to the standard reference conditions of air ISO 6358 (20°C, 1bar). For conversion to other densities and temperatures refer to Sec. 1: “Technical Fundamentals”.
operating position of valve - open
Lateral connection DN2 for vacuum relief valve
Contact CSR Department
