The NORVAL Pressure Regulator by Pietro Fiorentini

The NORVAL is a self-actuated, spring-loaded pressure regulator designed for medium and low-pressure applications downstream. It is adept at handling gaseous, non-corrosive fluids as long as they've been pre-filtered.

The NORVAL responds rapidly to shifting operational conditions thanks to its balanced valve design. This feature renders it particularly useful in situations like serving ON-OFF burners and other industrial processes requiring swift flow rate adjustments.

One of the key advantages of the NORVAL regulator is its impressive regulation accuracy, even in the face of considerable changes in upstream pressure and flow rate, making it an ideal choice for natural gas gate stations and a range of industrial and commercial applications.

In its basic version, the NORVAL regulator categorizes it as a "Fail to Open" type, meaning if it fails, it does so in the open state. The NORVAL sports a top-entry design, conferring various management benefits, including the ability to carry out comprehensive maintenance without disconnecting it from the piping network.

FEATURES

• Simple Installation
• 250:1 Turndown: Allows for wider applications
• Constant Outlet Pressure, despite varying inlet pressures
• High Accuracy
• Balanced Valve Design: Provides quick response to varying operating conditions 
• Over Pressure Protection: Optional bolt on slam shut

The NORVAL regulator is crafted with an emphasis on modularity, facilitating the inclusion of alternative devices and additional accessories within its basic structure. Furthermore, these additions can be made later without altering the current piping connections. A unique add-on is the slam-shut, a safety accessory that cuts off the gas flow when it detects abnormal pressure conditions, compared to the set pressure switch point.

Two model variants, SN91 and SN92, are available, and the precision class of the block device can reach up to AG 2.5. The slam-shut device comes with an optional manual tripping button for localized operation. The slam-shut device needs to be manually reset for safety purposes, and a bypass device is incorporated within the valve to simplify this process.

Furthermore, the slam-shut device can be equipped with either pneumatic or electromagnetic attachments for remote operation. It can also incorporate sensors such as micro-switches for remote tripping signal transmission.

For more information, contact:

Combustion Technology, LLC

http://combustion-tech.net
800-327-1831

Medium to Low Pressure Gas Regulators

Gas pressure regulators are essential in medium and low-pressure natural gas combustion systems. They control and maintain a consistent gas pressure, ensuring the safe and efficient operation of the combustion process. In medium and low-pressure natural gas systems, these regulators reduce the high-pressure gas from the main supply lines to a safe and stable pressure suitable for the combustion appliances or equipment.

Here's a detailed explanation of the function of gas pressure regulators in medium and low-pressure natural gas combustion systems:

1. Pressure reduction: The primary function of a gas pressure regulator is to reduce the incoming high-pressure gas to a lower, more manageable pressure. The regulator achieves this by employing a spring-loaded diaphragm assembly, responding to the pressure changes in the gas flow. The diaphragm helps open or close the regulator's valve, thereby adjusting the gas flow through the regulator and controlling the outlet pressure.
2. Pressure stability: Gas pressure regulators maintain a consistent outlet pressure despite gas supply or demand fluctuations. Pressure stability is crucial for the safe and efficient operation of combustion systems, as unstable pressure can cause incomplete combustion, leading to potentially hazardous situations. The regulator's diaphragm and valve assembly work together to balance the forces exerted by the incoming gas pressure, the spring, and the outlet pressure, ensuring a stable and consistent pressure output.
3. Overpressure protection: In the event of a malfunction or failure within the gas supply system, the pressure regulator may encounter abnormally high gas pressure. Most regulators are equipped with built-in overpressure protection mechanisms to prevent damage to downstream equipment or appliances, which may include pressure relief valves or vents that allow excess pressure to escape, thus protecting the downstream equipment.
4. Safety shut-off: Some gas pressure regulators feature an integrated safety shut-off mechanism. This feature automatically shuts off the gas flow in case the outlet pressure goes beyond acceptable limits, ensuring the safety of the combustion system and avoiding potential damage or hazards.
5. Pressure compensation: In some cases, gas pressure regulators are also responsible for compensating for pressure fluctuations resulting from gas temperature or altitude changes. These regulators can maintain a consistent outlet pressure under varying environmental conditions by incorporating temperature or altitude compensation mechanisms.

In summary, gas pressure regulators play a crucial role in medium and low-pressure natural gas combustion systems by reducing and stabilizing the gas pressure, providing overpressure protection, ensuring safety shut-off, and compensating for pressure fluctuations due to temperature or altitude changes. These functions are vital for the safe and efficient operation of combustion appliances and equipment and the prevention of potential hazards.

PF Cirval Medium to Low Pressure Gas Regulators

PF Cirval medium to low pressure gas regulators are available in two sizes: the Cirval 200 with an 8-inch head and the Cirval 300 with a 12-inch head. Designed by Pietro Fiorentini, the Cirval regulator features a diaphragm and a setting spring that control a balanced valve cartridge. This regulator is used in medium and low-pressure natural gas distribution systems and commercial and industrial applications. It is suitable for use with pre-filtered, non-corrosive gases. In compliance with the European Standard EN 334, the PF Cirval classifies as a fail-open regulator.

Designed according to ANSI B109.4 and CSA 6.18 standards, the Cirval regulator operates in a fail-open mode as specified by EN 334. The leakage class of this regulator is bubble-tight, which is better than Class VIII as per ANSI/FCI 70-3.

For more information, contact:

Combustion Technology, LLC

http://combustion-tech.net
800-327-1831

Combustion Technology Distributes Pietro Fiorentini Gas Regulators in Pacific Northwest

Pietro Fiorentini is a world-leading gas pressure regulator manufacturer of various gas-fired indoor and outdoor equipment. The company also develops technologically cutting-edge products and services for gas distribution.

Combustion Technology, Inc. is very pleased to be selected as the product line distributor in the Pacific Northwest (the states of Oregon, Washington, and Idaho).

Pietro Fiorentini product lines include:

• GOVAL Line Pressure Regulator
• Governor
• Dival 600
• Trias
• Dival 160 AP
• Dival 500
• VS/AM 65
• VS/AM 58
• Aperval
• SCN Slam Shut
• Aperval 101
• Aperflux 101
• Governor 2 PSIG
• Dilock Safety Device
• Aperflux 851
• Governor Dual Cut 10 PSIG
• PVS 782 Slam Shut
• Zero/Ratio GOVERNOR Regulators
• Governor PF400 Outdoor
• PVS 803 Slam Shut
• Governor PF400 Vertical Vent Limiter
• Governor PF400 Vent Limiter
• Mod FE
• Mod FEX
• Norval
• Cirval
• Reflux 819
• Reval 182
• HBC 975
• Staflux 185
• SBC 782 Safety Device
• Staflux MINI

For more information about Pietro Fiorentini Gas Regulators contact Combustion Technology, LLC. Call 800-327-1831 or visit https://combustion-tech.com.