Hydraulic fluid power. Two-, three-and four-port screw-in cartridge valves. Cavities with ISO 725 (UN and UNF) threads algolia-ignore manholes and inspection chambers identified

manholes and inspection chambers identified through visual inspection

This  British Standard is arranged on a topical basis

These designs may have different speed capabilities

It also covers the requirements for the connectors and stiffeners

Note: Provisions for the use of grout admixtures are not part of BS EN 934-4 but are covered by EN 447

Hydraulic fluid power. Two-, three-and four-port screw-in cartridge valves. Cavities with ISO 725 (UN and UNF) threads algolia-ignore manholes and inspection chambers identified1 Scope This Technical Report specifies the dimensions and provides other data relating to cavities with ISO 725 UN and UNF threads in which two , three , and four port screw in cartridge valves are mounted, in order to ensure dimensional interchangeability. It is applicable to two , three , and four port screw in cartridge valves generally used in industrial, agricultural, mining and mobile equipment