The Fisher® 95 series regulators are direct-operated, downstream pressure-regulating devices for clean, non-viscous fluids.
How Fisher® 95 series regulators operate
Fisher® 95 series regulators have a pretty basic operation principle — they balance the forces of the downstream pressure registered by the diaphragm (upward force) and the downward force provided by the main spring.
Before the regulator is pressurized, the valve plug is held open by the main spring because there’s no downstream pressure under the diaphragm. But as downstream pressure increases under the diaphragm, the diaphragm lifts and compresses the main spring. This movement allows the plug to travel toward the orifice, restricting and ultimately shutting off the flow.
Further, when demand increases, the pressure under the diaphragm is reduced, allowing the main spring to extend. The plug then moves away from the orifice, allowing flow to resume.
About Fisher® 95 series regulators
The 95 series regulators are available in different body construction materials, process connections, trim seats, and diaphragms.
Body material
- Cast iron
- Carbon steel
- Stainless steel
Process connections
- Threaded
- Flanged
Trim seats
- Soft
- Class VI shutoff
- Metal
- Class IV shutoff
Diaphragm (usually the same material as the seat)
- Stainless steel
- For steam and other hotter services
- Neoprene
- For other fluids, like carbon dioxide or air
These regulators are available in sizes from ¼” to 2”. Downstream pressure ranges from 2 lbs. to 150 lbs. depending on the design and body size of the regulator.
If you have any questions or would like assistance with sizing a regulator, give us a call at (314) 665-1741. We’re here to help!
