Key Parameters
Category Parameter Name Description & Typical Values
Valve Specifications Valve Size 1/2" to 6" (DN 15 to DN 150)
End Connections Flanged - ANSI Class 150, 300, 600. RF (Raised Face) or RTJ (Ring Type Joint) facings.
Body Styles Globe Body - Standard. Angle Body - Also available for erosive/cavitating services or where a 90° turn is needed.
Body Materials Carbon Steel (WCB) - Standard. Stainless Steel (CF8M/316) and other alloys are available.
Pressure & Temperature Pressure Class ANSI Class 150, 300, 600
Temperature Range Standard packing: -40°F to 450°F (-40°C to 232°C). Extended ranges possible with high-temperature packing and designs.
Internal Parts (Trim) Trim Types Quick-Open (Standard), Linear, Equal Percentage.
Trim Designs Post-Guided (Standard) - For general service. Cage-Guided - For superior stability, reduced noise, and balanced trim option.
Trim Characteristics Unbalanced Trim (Standard) - Requires higher actuator force. Balanced Trim (Optional) - For high pressure drop applications, reduces actuator force.
Leakage Class Class II (standard metal seat). Class IV or Class VI (with optional soft seat).
Trim Materials Stainless Steel (Standard), 316 Stainless Steel, Stellite, Hastelloy, and other alloys.
Flow Capacity Flow Coefficient (Cv) Varies by valve size and trim. Consult specific Cv tables for accurate values. Example: A 2" N300 has a typical Cv range from ~10 to 70 depending on trim.
Actuator (Typical) Type Fisher 657 (spring-and-diaphragm, direct-acting) or 667 (spring-and-diaphragm, reverse-acting).
Action Air-to-Open (Fail Close) or Air-to-Close (Fail Open).
Standard Signal 3-15 psig (0.2-1.0 bar) control signal.
Key Parameters
Category Parameter Name Description & Typical Values
Valve Specifications Valve Size 1/2" to 6" (DN 15 to DN 150)
End Connections Flanged (ANSI 150, 300, 600 lbs) - Standard. Other connections may be available.
Body Materials Carbon Steel (WCB) - Standard. Other materials like Stainless Steel may be optional.
Pressure Ratings Maximum Inlet Pressure Up to 1440 psig (~100 bar) - Dependent on valve size and pressure class.
Outlet Pressure Range (Y610A/Y611A) Adjustable via spring. Multiple spring ranges available, e.g.: 5-50 psig, 20-200 psig, 100-400 psig (0.3-3.4 bar, 1.4-13.8 bar, 6.9-27.6 bar).
Back-Pressure Setting Range (Y612A) Adjustable via spring, with a wide selection of ranges similar to the reducing valves.
Internal Parts (Trim) Trim Design Balanced, Single-Port Plug - Standard, for stable control.
Trim Materials Stainless Steel - Standard. Other materials like Carbon Steel, Stellite available.
Diaphragm Material Reinforced Elastomer (e.g., NBR) - Standard.
Performance Flow Characteristic Linear - Standard, providing proportional control.
Leakage Class Class II (metal-to-metal seat, standard). Class IV (with optional soft seat).
Temperature Limits Standard: -20°F to 150°F (-29°C to 66°C) with elastomer diaphragm. Higher temperatures possible with specific components.
Key Parameters & Specifications
Category Parameter Name Description & Typical Values
Electrical Input Input Signal Standard: 4-20 mA DC (2-wire). Other Options: 10-50 mA, 1-5 VDC, 0-100 mV, etc.
Input Impedance ~850 ohms at 20 mA (for 4-20 mA, 2-wire). Varies for other signals.
Power Supply For 2-wire 4-20 mA, the loop power supply is typically 12-45 VDC, depending on load.
Pneumatic Output Output Pressure Ranges Multiple standard ranges, e.g.:
• 3-15 psig (0.2-1.0 bar)
• 3-27 psig (0.2-1.9 bar)
• 6-30 psig (0.4-2.1 bar)
Air Supply Pressure Must be at least 3-5 psi (0.2-0.35 bar) above the maximum required output pressure. Typical max supply: 20 to 150 psig (1.4 to 10.3 bar).
Performance Accuracy Typically ±0.5% of span (including linearity, hysteresis, and dead band).
Sensitivity Typically 0.05% of span.
Air Consumption (Static) Very low (e.g., < 0.2 SCFH) when output is stable.
Air Flow Capacity (Dynamic) Very high. Up to ~30 SCFM (approx. 50 m³/h) to quickly fill and exhaust actuator volumes.
Environmental & Physical Enclosure Rating NEMA 4X (IP66) - Weatherproof, watertight, and corrosion-resistant.
Ambient Temperature Range Standard: -40°F to 180°F (-40°C to 82°C). Extended: -50°F to 225°F (-46°C to 107°C) with specific options.
Material Aluminum enclosure with corrosion-resistant epoxy coating. Stainless steel hardware.
Mounting Directly to actuator (with bracket) or via 1/2" NPT conduit connection.
Approvals Intrinsic Safety & FM/ATEX Available with appropriate intrinsic safety barriers or as an entity-approved device (FM, CSA, ATEX).
Key Parameters
Category Parameter Name Description & Typical Values
Valve Specifications Valve Size 1/2" to 6" (DN 15 to DN 150) - Extensive size range.
End Connections Flanged (ANSI 125, 150, 200, 300, 600 lbs), Screwed (NPT), Socket Weld.
Body Materials Cast Iron (Std.), Ductile Iron, Carbon Steel, Stainless Steel, and other alloys.
Pressure Ratings Maximum Inlet Pressure Up to 4000 psig (276 bar) for high-pressure bodies. Varies by body type and material.
Outlet Pressure Range (R622/R642) Adjustable via spring. Dozens of spring ranges available, from very low (e.g., 5-50 psig / 0.3-3.4 bar) to very high (e.g., 500-1500 psig / 34-103 bar).
Back-Pressure Setting Range (R652) Adjustable via spring, with a wide selection of ranges similar to the reducing valves.
Internal Parts (Trim) Trim Styles Single-port (Std.) or Cage-style (for guided stability, easy maintenance).
Trim Characteristics Quick Opening (Std.) or Linear & Equal Percentage (available for cage-style trim).
Trim Materials Stainless Steel (Std.), Carbon Steel, Stellite, Hastelloy, etc. Soft Seat (PTFE) option for tight shut-off (Class IV/V).
Diaphragm Material Reinforced Elastomer (NBR std.), PTFE, or Metal.
Performance Flow Characteristic Quick-opening (standard single-port), Linear or Equal Percentage (cage trim).
Leakage Class Class II (metal-to-metal seat, standard). Class IV or V (with optional soft seat).
Temperature Limits Standard: -20°F to 150°F (-29°C to 66°C) with elastomer diaphragm. Up to 1000°F+ (538°C+) with special components (asbestos-free packing, metal diaphragm, etc.).
Key Parameters
Category Parameter Name Description & Typical Values
Valve Specifications Valve Size 3/4", 1", 1-1/4", 1-1/2", 2" NPT
End Connections Screwed (NPT) - Standard
Body Materials Aluminum (Standard for non-corrosive services). Other materials like cast steel or stainless steel may be available.
Pressure Ratings Maximum Inlet Pressure (H722) Up to 5 psig (∼35 kPa). For higher inlet pressures, a primary reducing regulator is required upstream.
Outlet Pressure Range (H722) Adjustable via spring. Various spring ranges are available, typically from 3" H₂O to 60" H₂O (0.75 to 15 kPa).
Pressure Setting Range (H733) Adjustable via spring. Various spring ranges are available, typically from 3" H₂O to 60" H₂O (0.75 to 15 kPa).
Internal Parts Diaphragm Material Neoprene-coated fabric (standard). Other materials like Buna-N or Viton may be available for specific services.
Performance & Environmental Temperature Limits Standard: -20°F to 150°F (-29°C to 66°C). Temperature can affect spring rate and diaphragm life.
Leakage Typically Class II (standard metal seat) or Class IV (with optional soft seat).
Key Parameters
Category Parameter Name Description & Typical Values
Valve Specifications Valve Size 1/2" to 3" (DN 15 to DN 80)
End Connections Flanged (ANSI 125/250/300 lbs), Screwed (NPT), or others
Body Materials Cast Iron, Ductile Iron, Carbon Steel, Stainless Steel
Pressure Ratings Maximum Inlet Pressure Up to 4000 psig (275 bar), depending on size and body material
Outlet Pressure Range Adjustable via spring. Various spring ranges are available, e.g., 3 to 125 psig (0.2 to 8.6 bar), 50 to 300 psig (3.4 to 20.7 bar), etc.
Pressure Class ANSI Class 125, 150, 300, etc.
Internal Parts (Trim) Trim Materials Stainless Steel, Carbon Steel, and other alloys depending on the service.
Diaphragm Material Reinforced Elastomer (e.g., NBR) or PTFE for corrosive services.
Performance & Environmental Flow Characteristic Quick-opening (standard). Other characteristics may be available.
Leakage Class Class II (standard) or Class IV (with soft seat).
Temperature Limits Standard: -20°F to +150°F (-29°C to +66°C) with elastomer diaphragm. Higher temperatures possible with specific materials (e.g., PTFE).
Configurations Control Action Pressure Reducing: Direct-acting (fails to close).
Back-Pressure Relief: Direct-acting (fails to open).
Technical Specifications
Input: Hydrostatic head pressure from liquid level.
Output: Standard pneumatic signal: 3-15 psig (0.2-1.0 bar).
Air Supply: Typically 20 psig (1.4 bar) clean, dry, instrument air.
Accuracy: Typically ±0.5% of span.
Span Ranges: Adjustable over a wide range. Common minimum span is around 25 inH₂O (62 mbar), and maximum span can be several hundred inches of water column.
Materials of Construction:
Case: Aluminum or epoxy-coated cast iron.
Wetted Parts: Stainless steel (standard), Monel, Hastelloy C, and others.
Process Connections: Various options including 2" NPT, 3" NPT, and ANSI flanges.
Typical Applications
The Fisher Type 630 is widely used in industries that rely on pneumatic control or have harsh environments:
Oil & Gas: Level measurement in separators, scrubbers, and storage tanks.
Chemical & Petrochemical: Interface level control in reactors and distillation columns.
Power Generation: Drum level measurement and other boiler applications.
Water & Wastewater: Level monitoring in treatment tanks and sumps.
Pulp & Paper: Chemical level control in various stages of the process.
Technical Specifications
Category Specification
Type Volume Booster Relay, Force-Balance
Input Signal 3 to 15 psig (0.2 to 1.0 bar) standard
Output Signal 1:1 ratio of input, 3 to 15 psig
Air Supply 20 psig (1.4 bar) minimum up to 100 psig (6.9 bar) maximum (depending on model and output pressure required)
Flow Capacity Very high; significantly greater than a standard I/P converter or controller. Specific Cv (Flow Coefficient) values are available in detailed manuals (e.g., Cv ~ 1.4 for a 1/2" NPT model).
Accuracy Typically within ±0.5% of output span (including linearity and hysteresis)
Repeatability Typically ±0.1% of span
Sensitivity Typically ±0.05% of span
Connections 1/4" or 1/2" NPT (National Pipe Thread) female
Body Material Cast Iron (standard, with corrosion protection), Ductile Iron, Aluminum
Diaphragm Material Buna-N (standard)
Technical Specifications
Category Specification
Type Pilot-Operated Back Pressure Regulator / Relief Valve
Models Type 1808: Globe Body
Type 1808A: Angle Body
Service Gas or Liquid
Body Size & Connection 2 Inch NPT (National Pipe Thread)
Maximum Inlet Pressure 150 psig (10.3 bar)
Pressure Setting Range 3 to 125 psig (0.21 to 8.6 bar). Typically achieved with different pilot spring ranges.
Temperature Range -20° to 180°F (-29° to 82°C)
Pilot Connection 1/4 Inch NPT
Approximate Weight Type 1808: 22 lb (10 kg)
Type 1808A: 25 lb (11 kg)
Pilot Types Available for standard relief, differential, vacuum relief, and temperature actuation.
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