The Fisher Type 627F is a pilot-operated pressure reducing regulator equipped with a factory-mounted Type 6351F pilot. Designed specifically for high-accuracy performance in pressure-factor measurement or fixed-factor billing applications, the 627F uses external pressure registration and requires a downstream sensing line.
Features
High Accuracy for Pressure-Factor Applications
• The pilot system controls outlet pressure to within ±1% of the absolute setpoint (psia), even during full valve travel. This ensures minimal pressure deviation across wide flow and inlet pressure ranges, resulting in enhanced capacity and system stability.
Simplified Maintenance
• Trim components can be serviced or replaced without removing the regulator body from the pipeline. A convenient two-bolt connection between the body and diaphragm case makes disassembly quick and easy.
Flexible Installation
• The diaphragm case and regulator body can be rotated into four different positions, enabling easy installation in tight or confined spaces. The unit can be mounted in any orientation, provided the spring case vent is protected from environmental exposure.
Tamper-Resistant Design
• All Type 6351F pilots come with a standard adjusting screw locknut and a protective cap to help prevent unauthorized changes to pressure settings.
Broad Flow Range Options
• Multiple combinations of body and orifice sizes are available to meet diverse application flow requirements.
Reliable Shutoff Performance
• A flat-faced Nitrile (NBR) disk ensures a tight shutoff, enhancing safety and operational integrity.
Specifications
Body Sizes and End Connection Styles
• Ductile Iron: 3/4, 1 or 2 NPT
• Steel: NPS 1 or 2 / DN 25 or 50 CL150 RF; NPS 1 or 2 / DN 25 or 50 PN 16/25/40 RF
Outlet Pressure Range
• 5 to 100 psig / 0.35 to 6.9 bar in two ranges
Pressure Registration
• External
Temperature Capabilities
• -20° to 180°F / -29° to 82°C
Approximate Weights
• NPT body w/DI or ST casings: 10 Pounds / 4.5 kg
• NPT body w/AL casings: 6.3 Pounds / 2.9 kg
• Flanged body w/ST casings: 18 Pounds / 8.2 kg
• Flanged body w/DI casings: 14 Pounds / 6.4 kg
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