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Spence Product Information
Spence Type ED Series
Pressure Regulators
Available in Cast Iron and Cast Steel materials, the Spence Type ED pressure regulator is designed to reduce a steady or varying initial pressure to a constant, adjustable delivery pressure.
Normal accuracy of regulation is +- 1 psi. Ranging in size from 3/8" to 12", the type ED is designed for use in steam plants and district heating systems.
The Cast Iron valves are constructed for steam service up to 450°F; the Cast Steel valves are constructed for superheated steam service up to a temperature of 750°F.
This regulator is capable of single stage, two stage, and parallel reduction.
The adjustable range of delivery pressure
is determined by the choice of the pilot adjusting spring as follows:
| Cast Iron Type ED | Cast Steel Type ED |
| 3 to 20 psi | 3 to 20 psi |
| 5 to 50 psi | 5 to 50 psi |
| 10 to 100 psi | 10 to 100 psi |
| 20 to 150 psi | 20 to 150 psi |
The main valve and pilot bodies are suitable for maximum inlet conditions as follows:
| Cast Iron Type ED | Cast Steel Type ED | ||
| Connection | to 450°F | Below 600°F | 600°F to 750°F |
| NPT Screwed Ends | 250 psi | 300 psi | 300 psi |
| Flanged ANSI | 125 pound 125 psi | 150 pound 150 psi | |
| Flanged ANSI | 250 pound 250 psi | 300 pound 300 psi | 300 pound 300 psi |
| Flanged ANSI | 600 pound 600 psi | 600 pound 600 psi | |
The Type ED pressure regulator has many main valve accessories available for special order:
| Cast Iron | Cast Steel |
| Compositon Disc (for liquid, air or gas service) | Condensation Chamber (temperatures above 600*F) |
| Balanced Construction | SECOWELD Seat Construction (temperatures 600°F or higher) |
| Parabolic Disc | Parabolic Disc |
| Integral Mount | Stellited Seats and Discs |
The Type ED Pressure regulator has many pilot accessories available for special order:
| Cast Iron | Cast Steel |
| Enclosed Spring Chamber | Adjusting Handwheel |
| Adjusting Handwheel | Wall Bracket |
| Wall Bracket | Locking Device |
| Locking Device | Composition Disc |
| Composition Disc | Vacuum Spring Assembly |
| Integral Mount Body | |
| Vacuum Spring Assembly | |
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Type ED Pressure Regulator
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