INTRODUCTION
The DIVAL series pressure regulators are direct action devices with diaphragm control and spring contrast action suitable for medium and low pressures.
They allow a constant downstream pressure to be obtained for any upstream pressure value or flow demand as long as the upstream pressure and the flow, obviously, vary within the range of this series of regulators.
The particular features of this series are:
high flow coefficient;
high setting accuracy;
shutdown zone and shutdown over pressure relatively reduced;
rapid response;
hermetic seal with zero flow demand;
fail to open type;
periodical maintenance possible without dismantling the body from piping;
relief valve incorporated;
slamshut can be incorporated on regulators already installed.

MAIN FEATURES
Design pressure: 19 bar
Operating temperature: -10°C +60°C
Ambient temperature: -20°C +60°C
Max. inlet pressure pemax:

• 16 bar for DIVAL 160 and 250
  with head Ø 195

• 8 bar for DIVAL 160 and 250
  with head Ø 275 (on request 16 bar)

• 5 bar for DIVAL 50 and 100
  (on request 8 bar)

Range of outlet pressure Wh:

• 10 to 4000 mbar for DIVAL 160 and 250

• 10 to 2000 mbar for DIVAL 50 and 100

Accuracy class RG = up to 5
Closing pressure class SG: up to 10
Available size:

• DIVAL 50 : Rp 1" x 1"

• DIVAL 100 : Rp 1" x 1" ½

• DIVAL 160 : Rp 1" ¼ x 1" ¼ - 25 x 25 - 32 x 32

• DIVAL 250 : Rp 2" x 2" - 40 x 40 - 50 x 50

Connections:

• threaded according to UNI - 150 7 Rp

• flanging class 150 RF according to ANSI B 16.5 and NP 16 according to UNI 2282 or DIN 2633.

Modular design of pressure regulator DIVAL allows application of slam shut or device for use as "in line monitor" on the same body without changing the face-to-face dimension. Further more "top entry design" allows an easy periodical maintenance without removing body from pipe-line.

SLAM-SHUT VALVE
This is a device which immediately blocks the gas flow (SAV) when, in the event of failure, the downstream pressure to vary to reach the set-point, or if actuated manually.

INCORPORATED L SLAM-SHUT
L Slam shut can be incorporated both on the service regulator and on the in-line monitor. The regulator with the incorporated slam-shut has Cg coefficients equal to 95% of those of the basic regulator.
A further advantage of the incorporated slam-shut valve is that it can be fitted at any time on a previously installed DIVAL without modifying the regulating unit.

The main features of this slam-shut device are:
design pressure 16 bar;
operating temperature: -10°C +60°C;
ambient temperature: -20°C +60°C;
accuracy (AG): ± 5% of the pressure set-point for pressure increase; ±15% for pressure decreasing;
internal by-pass;
intervention for over pressure and/or under pressure;
manual push-button control;
possibility of pneumatic or electromagnetic remote control;
possibility of application of devices for remote signal (contact or inductive microswitches);
easy maintenance.

DIVAL FUNCTIONING AS MONITOR
The monitor is an emergency regulator which comes into operation in place of the main regulator if, in the event of failure, the latter allows the downstream pressure to reach the monitor set-point.

OPERATION OF THE DIVAL FUNCTIONING AS MONITOR
The DIVAL functioning as an in-line monitor is a regulator whith modified balancing system.
This modification guarantees greater accuracy of the regulated pressure and therefore an equally precise value for the intervention pressure without risk of interference with the main regulator.

INCORPORATED RELIEF VALVE (for Dival 50 and 100)
To avoid that small leak when there is no flow required or that sudden and of temporary overpressures such as deriving from rapid switching or overheating of the gas cause intervention of the slam shut, the DIVAL 50 and 100 are provided with an incorporated relief valve (SBV).
In the case of particular needs, the incorporated relief valve can be excluded.

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