The B400 Series ensures that tanks and vessels are kept safe during periods of excessive pressure due to external fire sources and also allows access to the tank for inspection / cleaning purposes.
Available as Emergency Pressure Only and Emergency Pressure and Vaccume Relief.
Standard Pressure settings + 4 mbarg to 140 mbarg
Standard Vacuum settings -2 mbarg to – 50 mbarg
Pressure Only Size Range range 8″ ( 200 mm) – 36″ ( 900 mm )
Pressure with Vacuum Relief Size range 18" (450mm) - 36" (900 mm)
Standard body materials – Aluminium, Carbon steel, Stainless steel
Standard trim material – Stainless steel
Diaphragm material – PTFE
Flanges – Drilled only API / ANSI / DIN / JIS / Specials
Hinged cover ensures automatic re seat
Steam Jackets available
Proximity Switches to indicate pallet lift
Alternative materials for hazardous applications
Non standard applications consult factory
Low cost maintenance
Lightweight design provides easy handling whilst interchangeable components ensure standard parts
are easily replaced
Testing / Quality
All products are factory tested and fully certified.
All products are designed so that any condensate drains away from seating areas.
Standard seating design ensures minimum leakage of less than 1 scfh at 90% of set pressure.
Internal parts are stainless steel as standard. Non standard materials available upon request.
All valves are supplied with drilled flanges to meet individual requirements.
Non Standard Applications
There are numerous options available for special applications. Exotic materials such as Hastelloy and
various plastics can be offered to suit the most hazardous of environments. Special coatings can be
applied for extreme service. For low temperature duties, internal parts can be PTFE coated to prevent
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