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Sizing Requirements

On/Off or Modulating Service Flows
Indicate whether the valve is for on/off or modulating service. The full range of inlet flows must be given and, in the case of a modulating valve, the minimum flow must be given. Inlet Pressures
When considering the valve inlet pressure be certain to account for line losses and head pressure from the inlet piping. The inlet pressure given must be the valve inlet and not the pump discharge pressure or the source pressure. Actuator Air Supply Pressures
The minimum available air supply must be known prior to sizing the actuator. Additional Cv Requirements Outlet Pressure
Any requirements for full flow at a reduced travel or additional flow capacity beyond the normal conditions must be known. When considering the valve outlet pressure be certain to account for downstream piping losses and head pressure, as well as effects from downstream orifice plates, diffusers, spargers or capillary tubes. If any such devices are used, the sizing information must be present on the valve specification sheet. Maximum Differential Pressure Condition
The maximum differential pressure conditionmust be given with the range of inlet temper- atures in order to provide adequate cavitation protection within the trim. For other conditions or more information, please contact Copes-Vulcan. Sales and Service
For information about our worldwide locations, approvals and certifications, and local representatives, please visit our web site. Web Site: www.spxvalves.com E-Mail: info@spxvalves.com 250 Riverside Ave. N. Sartell, Minnesota 56377-1743 Telephone: 320-259-2000 Fax: 320-259-2227 SPX Valves & Controls reserves the right to incorporate our latest design and material changes without notice or obligation.Design features, materials of construction and dimensional data, as described in this bulletin, are provided for your information onlyand should not be relied upon unless confirmed in writing by SPX Valves & Controls. Certified drawings are available upon request. Printed in the U.S.A. 010302