Fisher Y690AM Low-Pressure Regulator
Fisher Y690AM
The Fisher Y690AM Series pressure regulator is a high-performance device from Emerson/Fisher specifically designed for low-pressure gas regulation. It is a special configuration within the Y690A Series, featuring a blocked throat design combined with an O-ring stem seal. This configuration is intended for control systems requiring external pressure sensing, making it well suited for precise low-pressure gas regulation applications.
Main Applications
As a key pressure control component in low-pressure gas systems, the Y690AM regulator is widely used across various applications. It provides stable and reliable pressure reduction for low-pressure fuel gas and industrial gas supply systems, ensuring accurate pressure control at pipeline networks or equipment inlets.
When connected to an external pressure sensing line, it enables remote downstream pressure control, making it ideal for gas combustion systems, tank blanketing systems, and other low-pressure applications that require external downstream pressure feedback.
Key Features of Fisher Y690AM
External Pressure Sensing Design
With a blocked throat and O-ring stem seal, combined with an external control line connection, the Y690AM allows remote sensing of downstream pressure. This design is ideal for long-distance installations or complex piping layouts, ensuring precise pressure control.
Direct-Operated Regulating Mechanism
The regulator operates without an external air supply, providing fast response and stable control while simplifying system configuration and improving overall efficiency.
Multiple Material Options
Key components such as the valve body and diaphragm can be selected based on operating conditions, allowing compatibility with corrosive, high-temperature, or other demanding environments.
Easy Installation and Maintenance
The spring-loaded adjustment design allows quick on-site outlet pressure setting and supports routine field maintenance, reducing operating and maintenance costs.
Technical Specifications (Typical)
|
Item |
Specification |
|
Regulator Type |
Direct-operated pressure reducing regulator |
|
Series |
Fisher Y690A Series |
|
Model |
Y690AM |
|
Control Method |
External pressure sensing (external downstream sensing line required) |
|
Outlet Pressure Range |
Up to approximately 7 in. w.c. (≈ 17 mbar), depending on spring range and configuration |
|
Maximum Inlet Pressure |
10.3 bar (150 psig) |
|
Nominal Connection Sizes |
DN20 / DN25 (3/4″ or 1″) |
|
End Connections |
NPT (female) |
|
Control Line Connection |
1/2″ NPT (external downstream sensing) |
|
Applicable Media |
Natural gas, air, and other non-corrosive gases |
|
Operating Temperature Range |
Approx. –29°C to +149°C, depending on sealing material |
|
Sealing Materials |
NBR, FKM, EPDM (optional) |
|
Design Features |
Blocked throat design with O-ring stem seal |
|
Pressure Adjustment |
Spring-loaded adjustment |
|
Installation Orientation |
Horizontal or vertical (spring case vent must remain unobstructed) |
|
Typical Applications |
Low-pressure gas distribution, combustion systems, tank blanketing |
Construction and Operating Principle
The Y690AM regulator utilizes a piston/diaphragm combination pressure control element. By balancing spring force against the externally sensed downstream pressure, the regulator precisely controls valve opening to maintain stable outlet pressure.
The blocked throat design and O-ring stem seal effectively minimize leakage while ensuring reliable coupling with the external sensing line, providing stable and accurate remote pressure feedback.
Installation and Commissioning Recommendations
Installation Orientation: Ensure the spring case vent is unobstructed to maintain stable regulation.
Piping Connection: Connect the downstream pressure sensing line to the 1/2″ NPT port on the lower diaphragm casing, ensuring secure and leak-free installation.
Pressure Adjustment: Loosen the locking device and adjust the spring compression to set the desired outlet pressure, monitoring pressure changes with a pressure gauge.
Safety Check: Confirm correct upstream and downstream valve orientation to prevent reverse flow and potential equipment damage.
Company Advantages and Service Assurance
With many years of experience in Fisher pressure regulators and industrial control equipment, we have in-depth knowledge of the selection, application, and maintenance of low-pressure regulators such as the Y690AM. We have successfully served end users and engineering customers across multiple countries and regions worldwide, delivering stable and reliable products and solutions.
All Fisher Y690AM regulators supplied by us are genuine original products, with reliable and traceable sources, fully compliant with Emerson's official quality and performance standards. We provide an 18-month warranty and professional technical support, including product selection assistance, installation guidance, and after-sales service.
Leveraging China's mature supply chain, we are able to offer highly competitive China-based pricing while maintaining product authenticity and service quality, helping customers reduce procurement and maintenance costs and achieve long-term stable operation.
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