RTG 421 regulators are of indirect action type and are used for reducing and regulating the pressure of non-corrosive gases (natural gases, LPG, etc.). The regulators ensure constant maintenance of outlet pressure within the limits of the regulation class, irrespective of the fluctuations of inlet pressure and flow rate. They are designed for natural gas transportation and distribution networks. RTG 421 regulators can be used for all installations with rapid variations of the flow rate. The highly special performance of the pilot system ensures pressure accurate regulation and regulator rapid response.
Reference standards: EN 334 and EN 14382
CE Certificate according to PED 97/23/EC
| MODEL | RTG 421 • RTG 421 SB • RTG 421 M |
|---|---|
| TECHNICAL CHARACTERISTICS |
Maximum allowable pressure: 16/20 bar Inlet pressure range: 0,3 ÷ 30 bar Outlet pressure range: 0,2 ÷ 12 bar Minimum working differential pressure: 0,3 bar Accuracy class (AC): ±1 ÷ 5% Lock-up pressure class (SG): 2,5 ÷ 10% Intervention accuracy class (AG): - minimum up to 2,5% - maximum up to 1% (depending on the control pressure) |
| CONSTRUCTIVE CHARACTERISTICS |
Normally closed Normally open (RTG 421 FTO) Incorporated shut-off device (RTG 421 SB) |
| CONNECTION TYPE |
Flanges: PN 16 ÷ PN 20/ANSI Class 150 Nominal diameter: DN 25 ÷ DN 400 |
| OPTIONAL ACCESSORIES |
Incorporated silencer (AM) Pilot electric gas preheater (WE) |
| OPERATING CONDITIONS |
Ambient temperature: -30°C ÷ +80°C Working fluid temperature: -20°C ÷ +60°C |
| WORKING MEDIUM | Natural gas and other non-corrosive gases |
