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: