Pressure Instrument Accessories
A101 & A102 PULSATION DAMPENERS
MODEL A101 WITH ADJUSTABLE NEEDLE
MODEL A102 WITH POROUS METAL FILTER DISC
A101
WITH ADJUSTABLE NEEDLE
It protects pressure gauges against sudden pressure changes and fluctuations of the pressurized fluid. They are adjustable (variable orifice section) and can be individually adjusted to the conditions of operation. An eventual readjustment during operation is possible at all times.
Pulsations and pressure shocks found in compressors, hydraulic machines, chemical installations etc. are compensated to a wide extent.
This increases the pressure gauge life time and gives better reading accuracy.
WORKING TEMPERATURE
Brass : –10 to +100°C.
Stainless steel : –20 to +150°C
APPLICATION
For liquids , gas or steam
MATERIALS
Brass : up to 250 bar
Body and screw plug made of brass, adjusting stem made of stainless steel AISI 316
Stainless steel : up to 400bar
All parts are made of stainless steel AISI 316
PROCESS CONNECTION
1/2"BSP or NPT-M
1/4"BSP or NPT-M
INSTRUMENT CONNECTION
1/2"BSP or NPT-F
1/4"BSP or NPT-F
OPTIONAL EXTRAS
Degreased for oxygen
A102
TYPE WITH POROUS METAL FILTER DISC
Porous pulsation dampeners protect pressure gauges against sudden pressure changes and fluctuations of pressurized fluids and gases .The main component of this dampener is a porous metal filter disc. Pulsations and pressure shocks found in installations etc. are compensated to a wide extent.
This increase the pressure gauges life time and gives better reading accuracy.
WORKING PRESSURE
Up to 1000bar
MATERIALS
Stainless steel AISI 316 or brass
Filter material AISI316
PROCESS CONNECTION
1/2"BSP or NPT-M
1/4"BSP or NPT-F
INSTRUMENT CONNECTIONS
1/2"BSP or NPT-F
1/4"BSP or NPT-F
A111 & A112 OVERPRESSURE PROTECTORS
MODELA111 BELLOW TYPE
MODELA112 PISTON TYPE
Specifically designed to protect the pressure gauge from damage caused by overpressure exceeding the pressure gauge measuring range.
Completely automatic ,the valve closes and blocks consequently the circulatory to the pressure element to a pre-set value.
After decrease of pressure by about 25% below the pre-set value, valve opens and allows again circulation.
The pressure limiting valve, is also normally employed between gauges and diaphragm seals.
MATERIAL
Wetted parts stainless steel AISI 316
Heat numbers tamped on the body
SEALING RINGS
FKM(Viton)
OPERATING TEMPERATURE
– 40°C/ +120°C
ADJUSTABLE RANGES
A111 - bellow type 200mbar....4bar.
A112 - piston type 6bar....400bar. See table below
OVERPRESSURE SAFETY
600bar all ranges
PROCESS CONNECTION
1/2"NPT or BSP-M
1/4"NPT or BSP-M
INSTRUMENT CONNECTION
1/2"NPT or BSP-F
1/4"NPT or BSP-F
INSTALLATION
The protector is set to first value range when ordered without pre-set value
ADJUSTABLE RANGE TABLE
Range Spring no
200mbar/1.5bar 2
1…6bar 3
6…16bar 3
10…40bar 4
30…80bar 5
60…160bar 6
100…400bar 7
OPTIONAL EXTRAS
Material : monel
Degreased for oxygen (only up 50 bar and 60°C maximum)
Degreased but not for oxygen service all ranges
A151 & A152 GAUGE SIPHONS
MODELA151 U-SHAPE FOR HORIZONTAL MEASURING LOCATION
MODELA152 COILED FOR VERTICAL MEASURING LOCATION
Gauge siphons are used to protect pressure gauges against process fluid pulsations and to prevent over-heating.
The siphon is directly connected to the pressure gauge connection or to the shut-off valve or cock below the gauge. A condensate collects in the siphon and prevents the entry of hot fluid in to the pressure gauge.
Before start-up the syphon should be filled with a cooling barrier liquid.
MATERIALS
Carbon steel A106 Gr B,1/2" XS Stainless steel AISI 316,1/2" XS
INSTRUMENT CONNECTION
1/2"BSP or NPT-F ; sleeve
PROCESS CONNECTION
1/2"BSP or NPT-M or welding male
OPERATINGP RESSURE/TEMPERATURE:
100bar/120°C - 80bar/ 300°C - 64bar/ 400°C
OPTIONAL EXTRAS
Connections : flanges per UNI-EN or ANSI or other standards only for model A152
HOW TO ORDER
Specify : type, material, process connection, instrument connection
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