Direct Acting Regulator

S22 Direct Acting Regulator

DESCRIPTION:
The regulators S22 are a new line of direct action type pressure regulators, normally used in decompression installation for
civil and industrial uses in canalized networks for natural gas, manufactured gas, LPG or other non corrosive, preliminary
treated stable gases.
The S22 pressure regulators are “fail to open” type, which means that in case of malfunction due to the breaking of the
main diaphragm or as a result of a lack of impulse downstream, the regulator will open up completely.
The S22 pressure regulators are “top entry” type, which allows for maintenance operations without having to remove the
body from the pipes.
Modularity design allows for variation in its configuration even when already installed in stream. In addition, the modules
can be easily disassembled for eventual controls and in case of malfunctions can be easily replaced with spare modules and
subsequently repaired in the workshop, without having to shut down the installation.
The S22 pressure regulators have a counterbalanced regulation device.
The S22 pressure regulators have a stroke indicator for quick identification of the instrument in operation.

Available version:

.BP
for an inlet pressure range pf 0,5 ÷ 5 bar
for an outlet pressure range of 10 ÷ 150 mbar
.MP
for an inlet pressure range of 0,5 ÷ 5 bar
for an outlet pressure range of 10 ÷ 500 mbar
.AP
for an inlet pressure range of 0,5 ÷ 5 bar
for an outlet pressure range of 500 ÷ 4000 mbar
.APA
for an inlet pressure range of 2 ÷ 20 bar
for an outlet pressure range of 500 ÷ 4000 mbar
.APS (NOT COUNTERBALANCED)
for an inlet pressure range of 2 ÷ 20 bar
for an outlet pressure range of 500 ÷ 4000 mbar

Materials:

· Body in cast iron (GJS-400-18LT)
· Covers in aluminium die-cast EN AC46100 EN1706
· Diaphragms in rubber with cloth enforcement
· Seats in stainless steel or brass
· Springs in stainless steel

Features:

· Anti-pumping device (only for S21-3)
· Diaphragm shock absorber or relief valve
· Available with internal pressure pulse only
· In accordance to 2014/68/UE – EN334
· Working Temperature: -20° C (-30° C) ÷ 60° C
· Regulating Class: up to 5
· Closing Pressure Class: up to 10

Technical data:
· B: WITH OPSO/UPSO SHUT-OFF VALVE
· X: WITH MONITOR SHUT-OFF VALVE
. XB: WITH DOUBLE SHUT-OFF VALVE

	INLET PRESSURE			OUTLET PRESSURE				CG (VALVE COEFFICIENT)	CONNECTIONS
	BP, MP, AP	APS	APA	BP	MP	AP, APS	AP, APA
	BAR			MBAR
S22- 1	5 or 6	20		14 ÷ 150	150 ÷ 500	500 ÷ 4000		160	1” x 1”
S22- 2	5 or 6		20				500 ÷ 4000	281	1”x1”1/2

Dimension:
The choice of the regulator is made using the CG valve coefficient.
CG coefficient is numerically equivalent to the value of air flow in Scfh in critical conditions with full open regulator operating with an upstream pressure of 1 psia and a temperature of 15° C.
Flow rates with maximum operating at different operating conditions can be calculated as follows:

Q = capacity [Stm3/h]
Pu = Absolute upstream pressure [bar] Pd = Absolute downstream pressure [bar] Pb = Ambient atmospheric pressure [bar]
d = relative density (air= 1, non dimensional value)
K1 = body shape factor
tu = gas temperature at the inlet of the regulator under test in °C

OPERATING PRINCIPLE

The operating principle for the S22 regulators is the same as for all models, with the exception of certain marginal differences, exemplified below.
The S22 pressure regulator is a direct action type instrument with pressure control downstream through external impulse (A).
The downstream pressure is controlled by comparing the spring load (B) and the thrust deriving from the downstream pressure on the diaphragm (C).
The dia- phragm’s movement is transmitted by the lever system (D) to the rod (E) and stopper (F).
The rubber pad (G) is vulcanized on the stopper and assures hermetic closing when the required capacity is nil.
If during operation the thrust deriving from
the down- stream pressure is less than the spring load (B), the diaphragm (C) lower itself, and draws the stopper (F) away from the valve housing (H) until the downstream pressure once again attains the pre-set calibration value.
The regulator type S22-3 has two incorporated an- tipumping devices (L) which operate to reduce the inflowutflow of gas to the head during transitory phases, in order to exclude pumping phenomenon

Overall Dimension:

	H		A	B	C	D	F	G	E
	DN 40	DN 50							VERSION
	mm
S22-1 B	223		400	460	151	240		175	300	300	300 TR
									BP	MP	AP – APA
S22-1 X	223		400	460	151	400	130	175	300	300	300 TR
									BP	MP	AP – APA
S22-1 XB	223		400	460	151	240	130	175	300	300	300 TR
									BP	MP	AP – APA
S22-2 B	223	254	400	460	165	250		175	300	300	300 TR
									BP	MP	AP – APA
S22-2 X	223	254	400	460	165	410	170	175	300	300	300 TR
									BP	MP	AP – APA
S22-2 XB	223	254	400	460	165	250	170	175	300	300	300 TR
									BP	MP	AP – APA

 Installation:

 

 

S23 Direct Acting Regulator

DESCRIPTION:

The S23 regulators are a new line of pressure regulators – direct operating type – designed to guarantee a high regulation accuracy and a utmost easiness in use. These devices are usually used in distribution and industrial systems and are de- signed to be installed in regulation units in gas grids of natural, manufactured and Ipg gas or other non corrosive gases, filtered at first. The S23 pressure regulators are “fail to open” type, which means that in case of malfunction due to break- ing of the main diaphragm or as a result of a lack of impulse downstream, the regulator will open up completely. The S23 pressure regulators are “top entry” type, which allows for maintenance operations without having to remove the body from the pipes. Modularity allows for variation in its configuration even when already installed in stream. In addition, the modules can be easily disassembled for eventual controls.

Available version:

.BP
for an inlet pressure range of 0,5 ÷ 5 bar
for an outlet pressure range of 10 ÷ 150 mbar
.MP
for an inlet pressure range of 0,5 ÷ 5 bar
for an outlet pressure range of 10 ÷ 500 mbar
.AP
for an inlet pressure range of 0,5 ÷ 5 bar
for an outlet pressure range of 500 ÷ 4000 mbar
APA
for an inlet pressure range of 0,5 ÷ 5 bar
for an outlet pressure range of 500 ÷ 4000 mbar
.APS (NOT COUNTERBALANCED)
for an inlet pressure range of 2 ÷ 20 bar
for an outlet pressure range of 500 ÷ 4000 mbar

Materials:

• Body in cast iron (GJS-400-18LT) or steel (ASTM A352 LF2)
• Covers in pressed steel
• Diaphragms in rubber with cloth enforcement
• Seats in stainless steel
• Springs in stainless steel
• Available with internal pressure pulse only

Features:

• Counterbalanced regulating device
• Anti-pumping device
• Diaphragm shock adsorber or relief valve
• Top entry construction
• In accordance to 2014/68/UE – EN334
• Working Temperature: -20 (-30) ÷ 60
• Regulating Class: up to 5
• Closing Pressure Class: up to 10

Technical data:
AVAILABLE VERSIONS:
· B: WITH OPSO/UPSO SHUT-OFF VALVE
. M: WORKING AS MONITOR

	INLET PRESSURE			OUTLET PRESSURE				CG (VALVE COEFFICIENT)	CONNECTIONS
	BP, MP, AP	APS	APA	BP	MP	AP, APS	AP, APA
	BAR			MBAR
S23- 1	5 or 6		19	14 ÷ 80	75 ÷ 500	470 ÷ 2000	2000 ÷ 4000		DN50
S23- 2	5 or 6							3380	DN80

Dimension:

The choice of the regulator is made using the Cg valve coefficient.

Cg coefficient is numerically equivalent to the value of air flow in Scfh in critical conditions with full open regulator operating with an upstream pressure of 1 psia and a temperature of 15° C.

Flow rates with maximum operating at different operating conditions can be calculated as follows:

a. in non critical conditions (when Pe < 2 Pa)

 

b. in critical conditions (when Pe ≥ 2 Pa)

Q=capacity [Stm3/h]

Pe= absolute upstream pressure [bar] Pa= absolute downstream pressure [bar]

OPERATING PRINCIPLE

The operating principle for the S23 regulators is the same as for all models, with the exception of certain marginal differences, exemplified below.

The operating principle for the S23 regulators is the same as for all models, with the exception of certain marginal differences, exemplified below. The S23 pressure regulator is a direct action type instrument with pressure control downstream through external impulse (A).

The downstream pressure is controlled by comparing the spring load (B) and the thrust deriving from the downstream pressure on the diaphragm (C). The diaphragm’s movement is transmitted by the lever system (D) to the rod (E). The rubber pad (F) is vulcanized on the stopper and assures hermetic closing when the required capacity is nil. If during operation the thrust deriving from the downstream pressure is less than the spring load (B), the diaphragm (C) lower itself, and draws the stopper (F) away from the valve housing until the downstream pressure once again attains the pre-set calibration value.

The regulator has incorporated two anti-pumping devices (H) that have the function of slowing the inflow / outflow of the gas to the head in the transitory phases in order to eliminate possible phenomena of commutation.

Overall Dimension:

H

A

B

C

D

F

E

DN 65

DN 80

DN 100

OUTLET PRESSURE RANGE (MBAR)

MM

MM

MM

S23-1 B

298

750

960

500

210

160

630

630 TR

380

380 TR

10 ÷ 80

75 ÷ 500

470 ÷ 2000

1900 ÷ 4000

 

 Installation s23:

 

 

S24 Pilot operated pressure regulator

DESCRIPTION:

The S24 regulators are a new line of pressure regulators – piloted action type – designed to guarantee a high regulation accuracy and an utmost easiness in use. These devices are usually used in regulating stations & skids for civil and industrial uses in canalised network for natural gas, manufactured gas, LPG or other non-corrosive, preliminarily treated stable gases. The S24 pressure regulators are “fail to close” type, which means that in case of malfunction due to breaking of the main diaphragm or as a result of a lack of impulse downstream, the regulator will be closed completely. The S24 pressure regu- lators are “top entry” type, which allows for maintenance operations without having to remove the body from the pipes. Modularity allows for variation in its configuration even when already installed in stream. In addition, the modules can be easily disassembled for eventual controls.

Available version:

VERSIONS	CONNECTIONS AND INTERAXIS (mm)*	CG (VALVE COEFFICIENT)	INLET PRESSURE (bar)	OUTLET PRESSURE (bar)	PILOT TYPE
S24-1	DN25 – 183*	524	0,5 ÷ 20	0,01 ÷ 6	P1000 BP/MP
S24-2	DN40 – 223*	1049
S24-3	DN50 – 254*	2250		0,01 ÷ 20	P1000 BP/MP P2000 AP
S24-4	DN80 – 298*	4950

* INTERAXIS AS PER DIMENSIONS H IN FIG.A & B OF PARAGRAPH 7.1 AVAILABLE VERSIONS:
• B: WITH OPSO/UPSO SHUT-OFF VALVE
• M: WITH ACTIVE-MONITOR CONFIGURATION
• X: WITH ACTIVE-MONITOR AND OPSO/UPSO SHUT OFF VALVE
Materials:

• Body in cast iron (EN-GJS 400-18U LT)
• Covers in steel (ASTM A 350 LF2) or pressed steel (P275NH EN10028-3)
• Diaphragms in rubber with cloth enforcement
• Seats in stainless steel

Features:

• Counterbalanced regulating device
• Silenced version available
• Top entry construction
• In accordance to 2014/68/UE – EN334
• Working Temperature: -20°C÷ 80°C
• Regulating Class (AC): up to 1
• Closing Pressure Class (SG): up to 5

Dimension:

The choice of the regulator is made using the Cg valve coefficient.

Cg coefficient is numerically equivalent to the value of airflow in Stm3/h in critical conditions with full open regulator operating with an upstream pressure of 1 psi and a temperature of 15° C.

Flow rates with maximum operating at different operating conditions can be calculated as follows:

a. in non-critical conditions (when Pa < 0,29 Pe)

b. in critical conditions (when Pa ≥ 0,29 Pe)

Where:

Q = capacity [Stm3/h]

Pe= absolute upstream pressure [bar] Pa= absolute downstream pressure [bar]

OPERATING PRINCIPLE

The S24 pressure regulator is a piloted-action type device in which the mobile shutter (1) is kept into the closed position by the action of the spring (2), in absence of motorization.

The shutter (1) is completely balanced because appropriate holes (A) and ducts (B) carry the upstream pressure both in the upper part of the shutter (1) and in the chamber (C) to balance the stem.

All the movable element, is therefore perfectly balanced for whose variations in upstream pressure, even of considerable size, do not result in variations of forces and thus do not alter the balance between the forces due to the pressure differ- ence between the chambers (D) of motorization , the chamber (E) connected downstream, the spring (2) and the weight of the group components.

The shutter movements are controlled by the diaphragm (3) on which the spring (2) acts downwards (towards the clos- ing direction of the shutter) and the motorization pressure of the chamber (D), fed by the pilot, acts upwards.

 

The pilot is a device that serves to feed the motorization chamber (D) by balancing the regulated pressure (Pd) in the chamber (E) and the spring load (2) as a function of the regulated pressure (Pd) and determining stroke variations of the shutter according to the flow rate to be delivered.

 

To perform this function, the pilot is fed with gas taken upstream (in high pressure), filtered and reduced in pressure by means of devices incorporated in the pilot itself (or separate). Thanks to these devices, the valve (4) of the pilot receives clean and regulated gas with a pressure of about 2 bar higher than the downstream one (Pd). The delivery flow rate of the pilot is regulated by the shutter (5), controlled through kinematics by the diaphragm (6). The regulated pressure (Pd) in the downstream chamber (F) and the pilot regulation spring (7) act on the diaphragm (6).

When the regulated pressure (Pd) reached the set value, the diaphragm (6) moves upwards determining a flow equilibri- um between the supply valves (4) and the orifice (G) which discharges downstream. This creates a balance between the motorization pressure in the chamber (D) and the opposing forces (pressure regulated in the chamber (E), spring (2) and weight of the moving parts). In these conditions, the regulating shutter (1) is positioned at a lift that determines the flow rate delivered.

 

Due to a decrease in flow rate, the regulated pressure (Pd) tends to increase causing the pilot diaphragm (6) to move upwards causing a throttling of the valve (4) causing a decrease in the motorization pressure and therefore a new gradual closing position of the shutter (1).

Due to an increase in flow rate, the regulated pressure (Pd) tends to decrease, causing the pilot diaphragm (6) to move downwards, causing the valve (4) to open, causing an increase in the motorization pressure and therefore a new gradual opening position of the shutter (1).

 

If the flow rate is reduced to zero, the pilot diaphragm (6) rises bringing the obturator (5) to complete closure thus caus- ing a decrease in the motorization pressure until the obturator (1) closes completely and therefore the seal of the regula- tor.

If the regulated pressure (Pd) should suddenly increase due to a very rapid (and therefore anomalous) flow rate decrease, the diaphragm (6) rises bringing the shutter (5) to complete closure and, overcoming the action of the spring (8), caus- ing the opening of the valve (9) (built-in accelerator) which quickly discharges the motorization chamber (D) bringing the shutter (1) to quick closing.

a. Regulator installation diagram

b. Regulator & monitor installation diagram

Overall Dimension:

 Installation s23:

 

 

S25 Pilot operated pressure regulator

Product description
S25 are a new line of pressure regulator-pilot-controlled – suitable for use in high pressure gas network with noncorrosive gas filtered at first.
The feature peculiar to S25 regulators is the trivalent operating, i.e. in a single body is united the following operations: main regulator, monitor, shut-off valve.
Special use of a single body allows to reduce overall dimensions of regulation units and solve problems of replacement or conversion of existing units out of standard.

Materials
Body: Iron/Painted
Spring: Steel
Diaphragm: Approved NBR
Safety devices & Accessories
Shut off valve, OPSO, UPSO, Monitor

 

 

S26 Slam Shut Valve

Discription:

S26 slam shut valves are designed for straightforward implementation. These devices can be used on a wide variety of applications, from commercial meters to distribution stations. The S26 is available as a standalone device or can be used integrally on several Mesura regulators. The S26 is designed to be used with natural gas, propane, manufactured gas, renewable natural gas and other non-corrosive gases.

Features:

• Ductile iron and steel bodies
• NBR Diaphragms with cloth enforcement
• Stainless steel springs and seats
• Designed to EN 14382 and compliant to relevant ANSI standard

Technical Data:

Type	Model	Activation Pressure	Working Temperature	Connections
	BP: Base Pressure	12” w.c. to 3 psig (30 to 210 mbar)		1” NPT
S26	MP: Medium Pressure	2.17 to 8.7 psig (0.15 to 0.6 barg)	-22°F to 140°F (-30°C to +60°C)	1×1.5” NPT NPS 1.5 RF NPS 2 RF
	AP: High Pressure	7.25 to 87 psig (0.5 to 6 barg)

Slum Shut Valve 

Type S26:

S26_VDB150

 

 

 

S27 relief valve

The Relief valves S27 are devices which function is to
maintain the pressure in the system or in pressure vessels
within the limit set for the intervention.
These devices intervene following short-term events, pro-
viding to discharge externally a certain quantity of gas
when the grid pressure exceeds the calibration pressure,
thus avoiding or postponing the intervention of the slam
shut devices.

maintain the pressure in the system or in pressure vessels

Safety devices & Accessories:

X03

Materials:

Body: Aluminium Zinc / Painted

Spring: Steel

Diaphragm: Approved NBR

Technical features

	Inlet Pressure (bar)	Pressure range (bar)				diameter (mm)	Working
			MP	AP
527		040,15	0 5¥0,7			20	.20* 60
527	10			2+7