19th November, 2019:
Tekno Valves is pleased to offer new generation Offline Residual Pressure Valve (RPV) with Non-Return Valve in BOWN-12 series, successfully tested to EN ISO 10297:2017 and EN ISO 15996:2017 standard. The design is certified by BAM Berlin to European Transportable Equipment Directive (TPED) 2010/35/EU and available with “Pi” mark, rated at maximum valve test pressure of 360 bar.
The designs are offered in three different variants based on gas applications with following distinguishing features.
Series Type Approval Certificate Suitable Application Distinguishing features
BOWN-12/O BAM-TPED-2019-009 Oxygen & Hydrogen OPST tested for 50 shocks at 360 bar
BOWN-12/N BAM-TPED-2019-011 Inerts and Argon+CO2 gas mixture Stainless steel* lower spindle
BOWN-12/C BAM-TPED-2019-010 Carbon Dioxide High flow valve with Stainless steel* lower spindle
*Prevents cracks in brass soft seal retention skirts prone to stress corrosion cracking in Carbon dioxide environment.
BOWN-12 is available in recently published CGA 320R, CGA 580R and CGA 590R outlet connection as per CGA V-1-2019. This allows fillers to use the standardised filling connector on any RPV manufactured to CGA XXXR outlet connections.
The design has ingenious Residual Pressure Device (RPD) technology to prevent extrusion of the piston O-ring at high flow, provide reliable service life and discourage tampering. The RPD assembly is capsulated to facilitate ease of maintenance.
Benefits of using RPVs - The positive pressure ensures content purity and improves productivity in the cylinder fill operation by eliminating the need for purging of the cylinder. The Non-Return Valve (NRV) function in the Residual pressure device (RPD) prevents back flow of fluids into the cylinder from a higher-pressure source. The use of RPVs prevents moisture ingress and contamination in the cylinder which reduce potential for internal corrosion, improving cylinder life and improving safety.