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Layer: ssControlValve (ID: 133)

Name: ssControlValve

Display Field: FACILITYID

Type: Feature Layer

Geometry Type: esriGeometryPoint

Description: This point feature class has fourteen subsets to classify data; air release, combination, flushing connection, terminal flushing, vacuum release, dewatering valve, blow-off manhole, access manhole, overflow flap, surge relief, backflow control, air gap, simple check, and double check. An air release is used for odor control, with the added benefit of preventing corrosion in the manhole or vault from di-hydrogen sulfate gas. A combination is two or more subtypes that are conjoined. The most common combination is a combination flushing and air/vacuum release valve manhole. A flushing connection is in the connection between the remote seal flange and the piping flange in which the flushing ring is used to clean and drain the remote seals when it is required. Terminal flushing are mechanisms that are installed in manholes, primarily at the upstream terminal ends of sewage main to facilitate the periodic flushing of the downstream mains. A simple check is a clapper which hangs from a hinge, the clapper shaft or pin, which is mounted to the underside of the bonnet, inside the valve body is designed to allow fluid to flow one way in a pipeline and inhibits backflow within the line. A vacuum release uses differential pressure between atmospheric pressure and the partial vacuum pressure maintained in the piping network and vacuum station collection vessel.

Service Item Id: e7ad60cafa68487180e70060a69d18de

Copyright Text: Baltimore County, Maryland Department of Public Works & Transportation

Default Visibility: false

MaxRecordCount: 1000

Supported Query Formats: JSON, geoJSON

Min Scale: 0

Max Scale: 0

Supports Advanced Queries: true

Supports Statistics: true

Has Labels: false

Can Modify Layer: true

Can Scale Symbols: false

Use Standardized Queries: true

Supports Datum Transformation: true

Extent:
Drawing Info: Advanced Query Capabilities:
HasZ: false

HasM: false

Has Attachments: false

HTML Popup Type: esriServerHTMLPopupTypeAsHTMLText

Type ID Field: null

Fields: Relationships:
Supported Operations:   Query   Query Attachments   Query Related Records   Generate Renderer   Return Updates

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