Asameters model L …47 _ 50 all made of stainless steel, certified ATEX Ex ia IIC T4, T6 … Zone 0 and Zone 1 (on request), are designed for applications in potentially explosive areas thanks to their flameproof design.
They allow you to meet the challenging needs of the application sites: hazardous areas, high temperatures, high pressures and very low flow rates. Suitable for any type of gas or liquid also aggressive at extreme process and environmental conditions (low or high pressures and/or high temperatures).
Asameters model L …47 _ 50 are ideal for flow measurement where safety and product reliability are a must and not require power supply (in standard version with flow indicator only) ensuring a cost-free measure even in hazardous area.
In other words they provide the efficient and safe measurement of all process fluids.
The strengths of the L_Exd Asameters are the compactness of the body and the sturdiness of their executions.
They can be supplied with flow indicator only or together with microprocessor board for instantaneous, totalized and percentage flow rate with 4-20 mA output signal, Hart protocol (power supply: 24Vdc ± 10%) and Profibus PA interface (on request). All in 2-wire technology.
- 1 or 2 flow alarms (bistable inductive Namur type, certified for classified areas ATEX- CENELEC EEX ia IIC T6) or 1-2 PNP alarms type with relay
- feeder for inductive switches available in safe version too
- needle valve in stainless steel 316L
- differential pressure regulator model R880 for flows up to 3 nm3/h (air equivalent), when coupled with L Asameter keeps flow constant in presence of downstream or upstream variable pressure.
It is available with threaded ¼" gas-F or NPT f connections.
The standard differential pressure on regulating valve is 5 mt H2O or 12 mt H2O on request. Manufacturing materials are brass (diaphragm and shutter in buna) or stainless steel 316L (with diaphragm in PTFE and shutter in stainless steel 316L).
Available flow ranges are:
AIR min 1.6 nl/h max 5000 nl/h (T = 20° C P = 1013 mbar a)
WATER min 0.1 l/h max 160 l/h
Standard connections are threaded 1/2 ” Gas-F (NPT on request) or flanged PN16 DN15 UNI EN1092-1.
Upon request threaded connections 1/4″ NPT-F, flanged ANSI 150… 2500; RJ; JIS; or other possible on request, even elbow connections.
The maximum operating temperature in the standard version is 150 ° C and in the version for high temperature is 250 ° C.
The materials of construction are stainless steel 316L (on request Hastelloy, Monel and Titanium) for the measuring tube, the connections and all wetted parts in contact with the process fluid.
The external housing is die-cast aluminum, epoxy coated or available in stainless steel 316L (on request).
Available versions:
L …00/47 Ex ia II C T4, T6 with microprocessor pcb
L …00/50 Ex ia II C T4, T6 flow indicator only
