ALFA

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About Features Dimensions Connection Types
ALFA - Series regulators are two-stage self-operated pressure regulators for domestic and low capacity commercial use for NG, LPG, Town Gas, Methane, Air (For other gaseous on request. Please consider density correction factor for gases other than NG for nominal capacity selection). Equipped with slam shut mechanism against increase and decrease in outlet pressure (adjustable OPSO/UPSO). The discharge of the internal relief valve can be conveyed outside in case of installation in closed rooms or underground installations.

ALFA - Series (2.5m3/h→ 50m3/h)can be used at outlet pressure between 9→500 mbarby configuring properly of the regulator bill of materials.

ALFA - Series regulators are designed to be installed outdoor/indoor , wall mounted/underground box with different inlet/outlet configurations (Angle, Inline, U, T, Q), in individual domestic gas systems and meters

Inlet and outlet connections can be customized according to customer needs and standarts.

Thanks to smart engineering to achievie high reliablity and accuracy in regulation yielding measurement correction errors to keep at minimum level.

All service regulators are produced according to the international norms and standards such as EN88-2 and TS 10624.
GENERAL

The primary function of a spring loaded two stage gas regulator is to match the flow of gas through the regulator to the demand for gas placed upon the system. At the same time, the regulator must maintain the system pressure within certain acceptable limits.

Since the regulator’s job is to modulate the flow of gas into the system, restricting element (1stand 2nd stage plug) that will fit into the flow stream is essential and needed to provide a variable restrictied modulation of the flow of gas through the regulator.

In order to cause restricting element to vary, loading element (1stStage , 2nd Stage, relief , Over Pressure Shut Off (OPSO )/ Under Pressure Shut Off (UPSO) springs) is needed which can apply the required force limits to the restricting element. And measuring element (1stand 2nd , Slam Shut Valve (SSV) diaphragm)which tells regulator when flow has been perfectly matched and characterized to desired values is needed.

Outlet pressures over than set value is managed by built-in relief valve, OPSO valve, whereas below than outlet set value is managed by UPSO valve in SSV for secure operation. Built-in relief valve triggers when set value is reached to compansate outlet pressure increase such as termal expansion in downstream even apliances are off. OPSO/UPSO SSV is a safety device of which its restoration takes place manually prevents gas flow if anomalous downstream pressure conditions (Tripping of maximum/minimum outlet pressure) do occur.

OPERATION

Making sure all the utility /apliance connections are closed securely, by opening regulator upstream valve sligtly and slowly, gas with inlet pressure initially flows through the inlet filter and comes in front of the first stage. Gently pull SSV re-arm knob to let the gas from SSV plug until conveying gas under 2 nd Stg Diaphragm and SSV Diaphragm where pressure is reduced to the desired outlet value. Downstream pressure must be be observed whether it is at desired values. After completing the procedure release push button and SSV re-arm knob observing SSV re-arm knob still stays pulled.

alfa
dimensiondimension

*The specified dimensions are for information purposes only and Gasflow reserves the right to make changes without notice. Modifications can be made according to the customer's special requests and specifications. Please consult Gasflow for such requests.

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ALFAn

Download Brochure
About Features Dimensions Connection Types
ALFAn - Series regulators are two-stage self-operated pressure regulators for domestic and low capacity commercial use for NG, LPG, Town Gas, Methane, Air (For other gaseous on request. Please consider density correction factor for gases other than NG for nominal capacity selection). Equipped with slam shut mechanism against increase in outlet pressure (adjustable OPSO) and equipped with excess flow plug against increase in outlet flow rate or decrease in outlet pressure (nUPSO (non adjustable UPSO)). The discharge of the internal relief valve can be conveyed outside in case of installation in closed rooms or underground installations.

ALFAn -Series (2.5m3/h→ 50m3/h)can be used at outlet pressure between 9→500 mbarby configuring properly of the regulator bill of materials.

ALFAn - Series regulators are designed to be installed outdoor/indoor , wall mounted/underground box with different inlet/outlet configurations (Angle, Inline, U, T, Q), in individual domestic gas systems and meters

Inlet and outlet connections can be customized according to customer needs and standarts.

Thanks to smart engineering to achievie high reliablity and accuracy in regulation yielding measurement correction errors to keep at minimum level.

All service regulators are produced according to the international norms and standards such as EN88-2 and TS 10624.
GENERAL

The primary function of a spring loaded two stage gas regulator is to match the flow of gas through the regulator to the demand for gas placed upon the system. At the same time, the regulator must maintain the system pressure within certain acceptable limits.

Since the regulator’s job is to modulate the flow of gas into the system, restricting element (1stand 2nd stage plug) that will fit into the flow stream is essential and needed to provide a variable restrictied modulation of the flow of gas through the regulator.

In order to cause restricting element to vary, loading element (1stStage , 2nd Stage, relief , Over Pressure Shut Off (OPSO )/ Under Pressure Shut Off (UPSO) springs) is needed which can apply the required force limits to the restricting element. And measuring element (1stand 2nd , Slam Shut Valve (SSV) diaphragm)which tells regulator when flow has been perfectly matched and characterized to desired values is needed.

Outlet pressures over than set value is managed by built-in relief valve, OPSO valve, whereas below than outlet set value is managed by UPSO valve in SSV, excess flow plug (UPSO plug)for secure operation. Excess flow plugacts as flow capacity manager for excess flow range and also contributes operating characteristics. Built-in relief valve triggers when set value is reached to compansate outlet pressure increase such as termal expansion in downstream even apliances are off. OPSO/UPSO SSV is a safety device of which its restoration takes place manually prevents gas flow if anomalous downstream pressure conditions (Tripping of maximum/minimum outlet pressure) do occur.

OPERATION

Making sure all the utility /apliance connections are closed securely, by opening regulator upstream valve sligtly and slowly, gas with inlet pressure initially flows through the inlet filter and comes in front of the first stage. Gently pull SSV re-arm knob to let the gas from SSV plug until excess flow plug. While still pulling SSV re-arm knob, push re-arm button which will convey gas under 2 nd Stg Diaphragm and SSV Diaphragm where pressure is reduced to the desired outlet value. Downstream pressure must be be observed whether it is at desired values. After completing the procedure release push button and SSV re-arm knob observing SSV re-arm knob still stays pulled.

alfan
dimensiondimension

*The specified dimensions are for information purposes only and Gasflow reserves the right to make changes without notice. Modifications can be made according to the customer's special requests and specifications. Please consult Gasflow for such requests.

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BETA

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About Features Dimensions Connection Types
BETA Series regulators are two-stage, self-operated pressure regulators for domestic and low capacity commercial use for NG, LPG, Town Gas, Methane, Air (Please consider density correction factor for gases other than NG for nominal capacity selection). Equipped with excess flow plug against increase in outlet flow rate or decrease in outlet pressure (non -adjustable UPSO). The discharge of the internal relief valve can be conveyed outside in case of installation in closed rooms or underground installations.

BETA - Series (2.5m3/h→ 50m3/h)can be used at outlet pressure between 9→500 mbarby configuring properly of the regulator bill of materials.

BETA -Series regulators are designed to be installed outdoor/indoor, wall mounted/underground box with different inlet/ outlet configurations (Angle, Inline, U, T, Q)in individual domestic gas systems and meters.

Inlet and outlet connections can be customized according to customer needs and standarts.

Thanks to smart engineering to achievie high reliablity and accuracy in regulation yielding measurement correction errors to keep at minimum level.

All service regulators are produced according to the international norms and standards such as EN88-2 and TS 10624.
GENERAL

The primary function of a spring loaded double stage gas regulator is to match the flow of gas through the regulator to the demand for gas placed upon the system. At the same time, the regulator must maintain the system pressure within certain acceptable limits.

Since the regulator’s job is to modulate the flow of gas into the system, restricting element (1 and 2 stage plug) that will fit into the flow stream is essential and needed to provide a variable restrictied modulation of the flow of gas through the regulator.

In order to cause restricting element to vary, loading element (1 Stage, 2 Stage, relief springs) is needed which can apply the required force limits to the restricting element. And measuring element (1 and 2 diaphragm) which tells regulator when flow has been perfectly matched and characterized to desired values is needed.


For secure operation, outlet pressure over than set value is managed by built-in relief valve, whereas below than outlet set pressure value is managed by non adjustable UPSO with excess flow plug (UPSO plug) which also monitors inlet pressure synchronously with outlet pressure. Excess flow plug acts as flow capacity manager for excess flow range and also contributes operating characteristics. Built-in relief valve triggers when set value is reached to compansate outlet pressure increase such as termal expansion in downstream even apliances are off. When the spring-loaded double-stage excess flow gas regulator is designed and produced with the above elements, it has a typical regulator performance curve as in the graph.

OPERATION

Making sure all the utility/apliance connections are closed securely, by opening regulator upstream valve sligtly and slowly, gas with inlet pressure initially flows through the inlet filter and comes in front of the excess flow plug. Then push re-arm button which will convey gas under 2 Stg Diaphragm where pressure is reduced to the desired outlet value. Downstream pressure must be observed whether at desired values. After completing the procedure release push button.

beta
dimensiondimension

*The specified dimensions are for information purposes only and Gasflow reserves the right to make changes without notice. Modifications can be made according to the customer's special requests and specifications. Please consult Gasflow for such requests.

ANGLE

INLINE

T

U

Q

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*Images and dimensions are for reference purposes and may vary depending on the preferences made.GASFLOW TECHNOLOGY LIMITED reserves the right to change its product models and technical information without prior notice.GASFLOW does not assume responsibility for the selection, use or maintenance of any product.Responsibility for proper selection, use and maintenance of any GASFLOW product remains solely with the purchaser.