Products

PF Aperflux 851

PF Aperflux 851 Pilot-Operated Gas Pressure Regulators

APERFLUX 851 is a downstream pressure regulator, self actuated, pilot controlled, for medium and high pressure applications.
It is suitable for gaseous, non-corrosive, previously filtered fluids. It is particularly suitable for use within the framework of installations for the distribution of natural gas, as well as for supply networks for civil and industrial use.
The accuracy of the regulated pressure, the high Range Ability ratio, together with the fast adaptation to changes in the operating conditions, even in the presence of abrupt changes in the flow rate. The APERFLUX 851 regulator, is classified according to the European standard EN 334, as a regulator which reacts in opening (Fail to Open).
It is Truly a TOP ENTRY design, which confers to the regulator management advantages, for example the ability
to performs full maintenance without uninstalling it from the connection pipe.
 

Functional Features*:

• Maximum inlet pressure:  Up to 1,450 PSIG
• Temperature:  Pietro Fiorentini regulators are suitable for a minimum operating ambient temperature of: >- 40°F to 140°F with a carbon steel Body
If the following conditions are met:
-Inlet gas temperature shall always be higher than – 4°F
-Inlet flowing gas shall be filtered , clean , and without liquid impurities
• Range of inlet pressure:  18.8 to 1,230 PSIG
• Range of downstream pressure:  18.8 to 1,170 PSIG depending on installed pilot
• Minimum working differential pressure: 7.25 PSIG Recommended . 30 PSIG
• Accuracy class AC:  Up to 1% Gauge
• Look-up pressure class SG:  Up to 5% to 2.5% Gauge depending on outlet pressure

Design Features:

• Normal dimensions (DN):  1” ; 2” ; 3” ; 4” ; 6” ; 8” ; 10”
• Flanged connections: Class 150-300-600 RF or RTJ, according to ANSI B16.5 and PN 16 according to UNI 2282 or DIN 2263, (ISO 7005).

Materials**:
• Body: Cast steel ASTM A 352 LCC for classes ANSI 600 and 300
-Cast steel ASTM A 352 LCC for classes ANSI 600 and 300
-Cast steel ASTM A 216 WCB for classes ANSI 150 and PN 16
• Head Covers:  Cast steel ASTM A 350 LF2
• Diaphragm:  Rubberized canvas
• Seat:  Stainless steel for DN =< DN 80 (3”), carbon steel with stainless steel sealing edge for DN >= DN 100 (4”)
• Sealing ring:  Nitril rubber
• Connection fittings:  In zinc-plated carbon steel according to DIN 2353; Stainless steel on request.

*Different functional features available on request.
**The materials indicated above refer to the standard models. Different materials can be provided according to specific needs.

Downloads:
Aperflux 851 Brochure

PF Aperflux 101 Poster

PF Aperflux 851

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