Pressure Tight Caps

A leaking bottom valve on a road tanker, rail tank car or ISO container can let product build up behind a standard outlet cap, and whoever removes that cap is first in line if it lets go. TODO Safety Pressure Tight Caps were designed in partnership with leading chemical manufacturers in Europe to remove that risk. They seal the outlet completely, count as an official second or third closure in place of an extra valve, and make any hidden pressure obvious before the cap comes off.

How it works: once fitted, the cap locks automatically in both directions and can only be released by a deliberate action from the operator, so it can’t work loose in transit. If an upstream valve fails and pressure builds behind the cap, it stays sealed and keeps the product contained. When the operator starts to remove it, a bright red O-ring becomes visible, a clear signal that the line is under pressure, and the cap vents that pressure in a controlled way before it can be fully removed. The cap also accepts standard wire or plastic security seals for tamper evidence.

Built for demanding cargoes, the caps are machined from 316L stainless steel and rated for a maximum working pressure of 25 bar (363 psi), with a 37.5 bar (544 psi) test pressure. Standard seals operate from -20°C to +80°C, with an extended range of -45°C to +150°C available. O-rings can be specified in nitrile (NBR), Viton (FKM), EPDM, Kalrez or Chemraz (FFKM) and FMVQ to suit acids, solvents, hydrocarbons and LPG.

Sizes are 2″ (DN50), 3″ (DN80) and 4″ (DN100). The caps comply with the Pressure Equipment Directive 2014/68/EU and are TÜV approved for German rail tank cars, making them a trusted choice for chemical distributors, tank container operators, oil and gas terminals and LPG hauliers.

As a UK supplier of TODO products, BMS can help you choose the right size and seal material for your cargo, supply caps alongside TODO-MATIC dry-break couplings and adaptors, and support your loading and unloading equipment. Contact our team for pricing, lead times or the product data sheet.

Features & Benefits

TODO’s Pressure Tight Caps offer a balanced approach to safety and efficiency. They are designed to maintain pressure during leaks and can be easily removed manually for smooth operation. With these caps, the risk of product leakage due to line faults is eliminated, ensuring the safety of workers and peace of mind. These caps protect both operators and profit margins.

Some of the most impressive features are:

• Can be used as a third official point of closure when other safety systems are not in use
• The PTC locks automatically in either direction but requires a deliberate action to disconnect, guaranteeing safe and efficient operation within all applications
• Suitable for use with all commonly used wire and plastic custom seals
• Installed with red O-ring to indicate line failure
• Automatic depressurisation that reduces any static pressure upstream of the cap upon operation
• The PTC is certified as a full second or third closure, depending on the application. The cap can be used to replace other closure methods such as valves

All of these unmatched market-leading features promote safety without compromising ease and efficiency, making the TODO Safety Pressure Tight Caps the first choice for a range of applications.

Variants & Technical Information

These Safety Pressure Tight Caps are built with high-grade stainless steel and come in 2-4” sizes. This product can be fitted with an almost unlimited choice of O-ring grades, making them flexible to a wide range of different industry applications.

Max. Working Pressure – Up to 25 bar (363 psi)

Working Temperature Range – -20 to +80 degrees C (-4 to +176 Fahrenheit)

Sizes – 2″ (DN50), 3″ (DN80), 4″ (DN100)

Materials – Stainless steel only – made by using 316L grade stainless steel for exceptional durability even when handling aggressive chemicals

O-ring Grades – Nitrile (NBR or Buna), Viton (FKM), EPDM, Kalrez (FFKM), FMVQ, Chemraz (FFKM)

Applications

TODO’s Safety Pressure Tight Caps are widely recognized for their exceptional protection of both operators and stored products. This makes them an efficient choice for a variety of industries, including chemical, oil and gas, and LPG, particularly for road and tanker applications. Trusted by numerous major companies, TODO’s caps are a trusted solution for ensuring safe and efficient operations.

Our certified engineers provide nationwide installation, calibration and ongoing maintenance for this product. Book installation with your order and receive 50% off your first after-installation service visit. Talk to an engineer for details.