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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