high quality pressure regulator for gas industry Dival 500

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EUR 319-662 / Units | 1 Unit/Units (Min. Order)
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Quick Details
Place of Origin:
Brand Name:
Pietro Fiorentini
Model Number:
Dival 500
Maximum inlet pressure:
10 bar for BP version, 20 bar for MP and TR versions
Range of downstream pressure:
from 15 to 2.500 mbar
Supply Ability
Supply Ability:
10 Unit/Units per Week
Packaging & Delivery
Packaging Details
We have all variants of packaging, for example wooden boxes, germetic wooden boxes, plastic bags and so on. We will package by your needs!
St Petersburg
Lead Time :
Product Description

Classification and Range of use

The DIVAL 500 is a downstream direct-acting pressure regulator with balanced plug, for low, medium and high pressures.Suitable for previously filtered, gaseous, non-corrosive liquids; thanks to the concept of a balanced plug, you can achieve a high flow rate coefficient, highly accurate (even at maximum flow rates), a lock up zone and relatively low lock up pressure, no internal leakage at zero flow rate and reduced response times. The constancy of the regulated pressure and its accuracy, even with significant changes in the upstream pressure and/or flow rate, make the DIVAL 500 regulator especially suitable for power distribution networks in civil and industrial plants. It is built with a TOP ENTRY which gives the regulator important control advantages among which, for example, the ability to carry out full maintenance on it without removing it from the connection pipework. The basic version of the DIVAL 500 regulator is classified, according to European Standard EN 334, as a Fail to Open regulator.

Model Type 
Dival 500
Maximum inlet pressure
10 bar for BP version
20 bar for MP and TR versions
Range of downstream pressure:
from 15 to 2.500 mbar
Accuracy class AC
Up to 5
Look-up pressure class SG
Up to 10
Minimum environmental temperature
Operation up to -40°C (to be specified in the request).
Maximum environmental temperature
Inlet gas temperature
Up to -20°C +60°C (to be specified in the request).
DN calibres available:
25 (1”); 40 (1”1/2)
See connections available on configurator
Flanged connections:
UNI PN 16; ANSI 150 RF

Cast Iron GJS 400–18 UNI EN 1563 
Aluminium EN AC 43300 UNI EN 1706 
ASTM A 216 WCB (All DNs).
Aluminium EN AC 43500 UNI EN 1706

Fabric Finish Rubber (pre-formed using hot moulding process)

Brass / Stainless steel
Sealing ring

Nitrile rubber
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The Dival 500 series can be equipped with an incorporated relief valve that discharges the gas into the atmosphere when the regulator outlet pressure exceeds the set value. The events that can lead to the valve opening are:
-thermal expansion of the downstream gas in the absence of flow.
-pressure peaks caused by the downstream valve rapidly closing (in the event of small volumes).
When the outlet pressure returns to below the set value, the relief valve closes again.


This is a regulator valve that is usually fully open during normal operation of the service regulator. The MONITOR is an emergency pressure regulator that is usually upstream, in the direction of the gas flow, of another pressure regulator that performs the function of a SERVICE regulator.

Sizing the Pressure regulator

The regulator is usually chosen on the basis of the flow rate calculation determined through use of the flow rate coefficients (Cg or KG), as indicated by Standard EN 334. However, the analytical calculation method does not correctly size the regulator as the obtainable theoretical flow rate should not be considered, but only a percentage of it, which is variable in every situation, based on the required accuracy class and the available pressure difference. Please contact the sales office for correct sizing.
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