ARGOSPilot Operated Pressure Regulator

Main Spring

Diaphragm

Anodized aluminum cage with reduced capacity options

Metal Foam Silencer (optional) made from NiCr allows noise level reduction up to 20 dba

Cover

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• High rangeability

• High flow capacity

• Low noise level

• Easy maintenance

• Application versatility

Loading and discharge pressure connections located on both sides

Introduction

Gascat’s Argos is a pilot operated regulator developed for the “easy to own and operate” Natural gas Market. This regulator works extremely well at gate stations, as district regulators, and in industrial applications. It can be used as a single working regulator, a worker with a monitor, or as a two stage cut with monitor.

Argos has a top entry design allowing maintenance to be performed without removing the valve body from the pipe. It is designed with very few internal components which minimizes the risk of operator error, while giving you a low cost of ownership.

General Features

Flow Director

Flow Director

The flow director is part of the diaphragm assembly and has been specially designed by Gascats’ engineers to reduce the gas particles kinetic energy. It also redirects any foreign objects that may have entered the gas stream, keeping them from impacting the diaphragm.

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The design of our new cage has 10% of its orifices longerthan the others and has a greater degree of inclination. This results in a very wide rangeability. These longer orifices allow the regulator to flow a very small amount of gas when the diaphragm begins to open.

Specially designed longer orifices allow larger flow rangeability andincrease the diaphragms life time

The Argos cage is made from aluminum bar and is completely manufactured in a CNC machine. The surface is then treated by a hard anodization process resulting in a superior surface hardness. This process protects the cage against corrosion.

Cage

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Regulating Spring

Filter element

Sensing Diaphragm

Adjusting Screw

SPRING RANGE

24” - 3.2 psi

2.5 – 4.6 psi

3.3 – 5.8 psi

10 – 40 psi

30 – 80 psi

60 – 200 psi

BODY

COMPONENT

PILOTS G30F / G32F

ALUMINUM

MATERIAL

SPRING HOUSING ALUMINUM

DIAPHRAGM BUNA N (*)

INTERNALS BRASS / S.S.

FILTER ELEMENT POLYETHILENE

FILTRATION DEGREE 10 MICRONS

Easy access to the plug

Seat

Plug

DETAILS

Spring

Pilots

The Argos pressure regulator can be supplied with three pilot options depending on the outlet pressure desired.

The G-80 operates from 0.9 – 16 psi. The G-30 operates from 10 – 465 psi. The G-32 operates from 200 – 530 psi.

Their design is simple with few internal parts reducing the amount of maintenance time and associated costs.

To protect the plug and seat assembly, they all have an internal 10 micron filter element.

SPRING COLOR

Black

Silver

Silver

Green

Red

White

100 – 265 psi

200 - 465 psi

200 - 530 psi Black

Brown

Black

PILOT

G80

G30F

G32F

5 – 16 psi Gray

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Pressure Regulator Working Principle

The Argos pressure regulator operates by a changing the pressure in the valves upper chamber, the diaphragm chamber. This pressure is controlled by one of the pilots in the Gascat family of products.

At no flow the outlet pressure is greater than the pilot set point, closing the pilot and allowing full inlet pressure to build in the diaphragm chamber. This pressure in conjunction with the main spring supplies enough force to overtake the pressure under the diaphragm, keeping the regulator closed.

When flow starts, the downstream pressure decreases and the pilot starts to open the valve by reducing the pressure in the diaphragm chamber. Once enough pressure is removed from the chamber, the pressure under the diaphragm will be higher, allowing it to lift the diaphragm and start flowing.

Inlet Pressure

Loading Pressure

Discharge Pressure

Sensing Line

Loading Pressure

Sensing Line

Outlet Pressure

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Standby Monitor System

In the standby monitor system, the working principle of the regulators are the same as explained on the previous page. The upstream regulator, the monitor, stays in the open position because the pressure set point on its pilot is higher than the pilot on the active regulator. Both regulators sense the downstream pressure, and if the active regulator is operating properly, the monitors’ pilot will never be satisfied, causing the monitor valve to open fully.

If a failure in the active regulator occurs causing an increase in the downstream pressure, the pilot on the monitor will sense this and start to close the monitor valve as the downstream pressure reaches its set point. The monitor will then become the active regulator until repairs are made.

Working Monitor System

In the working monitor system both regulators are actively reducing the pressure. A second pilot is added to the upstream regulator to act as a monitor for the second pressure cut.

The upstream regulator, or first stage, has a pilot with a set point for the initial pressure cut. The monitor pilot, connected in series with the first stage pilot, has a set point slightly higher than the second stage pilot. In the case of a second stage failure increasing the outlet pressure, the monitor pilot would start closing, causing pressure to build in the first stage diaphragm chamber, closing the first stage valve until the monitor pilot is satisfied.

Monitor Pilot

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Technical Characteristics

BODY

COMPONENT

CARBON STEEL ASTM A216 Gr. WCB

COVER

CAGE / GRID ANODIZED ALUMINUM

SEALS BUNA N

DIAPHRAGM BUNA N / HYDRIN

MATERIAL

1’’

ND

2’’

3’’

4’’

13.5

CV (100%)

48

93

206

CONNECTION

Flanges ANSI B16.5 - 150# & 300#

Female NPT ANSI B2.1 only for ND 1’’

DIMENSIONS WEIGHT

1"

ND

2”

3”

7.25

A

10

11.75

B C D

4” 13.89

7.75

10.5

12.5

14.5

150# 300#

8.15

9.4

12.6

13.6

8.15

9.4

12.6

13.6

150# 300#

2.4

3.4

4.1

5.3

2.4

3.4

4.1

5.3

150# 300#

7.2

7.2

7.2

7.2

7.2

7.2

7.2

7.2

150# 300#

24

33

62

93

25

35

64

97

150# 300#

A

B

C

D

197, 420

CG

735, 1500

1392, 2900

2944, 6400

CAGE

50,100%

50,100%

50,100%

50,100%

CARBON STEEL ASTM A216 Gr. WCB

www.gascat.com.br

Gascat policy is one of continuous improvement and development. The Company reserves the right to change specifications and introduce improved designs without previous notice.

CERT

Representative

02/2

018

DVGW

Pilot Operated Low Pressure Regulator

ARGOS

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