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PIN-TECH BUBBLE-TIGHT < 500 PPM
PRESSURE RELIEF VENT
Series No. 56000
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Series No. 56000, Bubble-Tight <500 ppm Pressure
Relief Vents are designed
and tested to address concerns about the leakage of fugitive emissions
prior
to set point, and parts per million (ppm) emission rates.
| Protectoseal’s
PIN-TECH vents are mounted to the vapor space flange connection
of a storage tank or vessel. The vents utilize a unique
technology that employs a buckling pin to hold the vent
piston closed (Fig. 1) with zero leakage up to the relief
set point. The pin is an accurately machined, straight metal
rod. It is configured to precisely sense transmitted axial
forces that are generated as a result of tank pressure.
The force required to buckle the pin is governed by Euler’s
Law and is a function of the pin’s metallurgy, length
and diameter. An exact buckling force can be determined
for any specific |
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pin configuration. When the pressure in the tank
reaches the vent set point, the axial force is sufficient to buckle
the pin and the vent sealing piston is allowed to move to its
full open, relieving position (Fig. 2). The pin buckles completely
and instantaneously.
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Fig 1
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Fig 2
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Environmental Regulations: Protectoseal's PIN-TECH
vents provide a means of complying with the stringent VOC
emission requirements mandated by the United States Environmental
Protection Agency (EPA) outlined in Code
of Federal Regulations (40 CFR).
Materials of Construction: A comprehensive range
of materials is offered. Other special materials to withstand
the corrosive action of some vapors and atmospheric conditions
are available on request. Note: Buckling pin material is 304
Stainless Steel.
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- Stainless Steel with Steel Flange & Hood
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- Stainless Steel with Steel Flange & Aluminum
Hood
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Materials / Seals: Viton®, Neoprene, Buna-N, EPDM,
Kalrez®, and Chemraz®.
Buckling Pin: 304 Stainless Steel. Buckling pin is located
outside of process stream. Contact factory for “special”
material pin availability.
Sizes Available: 2" (50mm DIN) thru 24" (600mm
DIN).
Set Point Range: Pressure settings from 1 oz/in²
to 15 PSIG.
Testing / Certification: Each unit is factory tested
for leakage and correct setting to meet Protectoseal’s
high quality standards. The Series 56000 provides bubble-tight
sealing to set point as standard with optional testing and certification
for <500 ppm leakage. For extremely low ppm leakage units,
please contact factory and request information on Protectoseal’s
Series No. 57000 Pressure Relief Vents.
Sizing & Flow Capacity: Series No. 56000 PIN-TECH
Pressure Relief Vents provide full open flow at the point of
relief.
Flange Connections: All sizes mate with standard flanged
150# ANSI, API (20" or 24" only) or DIN PN 16 connections.
Other Options: PIN-TECH units can be furnished with optional
instrumentation to detect when the vent has opened.
Set Point Accuracy: Set points are accurate to withIN
+/-5% across the entire range of available settings (1 oz/in2
through 15 PSIG). The repeatability of the set point for any
specific vent configuration is assured by stringent machining,
assembly and test procedures and by strict control of the metallurgy
and dimensions of the buckling pin.
Maintenance: PIN-TECH Pressure Relief Vents are designed
to minimize and simplify maintenance and inspection procedures.
If the vent should open to relieve tank system pressure in excess
of the set point, the buckling pin can be quickly and efficiently
replaced to return the vent to its original, bubble-tight set
point.
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