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Operating instructions
Underground fire hydrants
Type 304/305
- based on EN 1074-6, EN 14339
- completely enamelled inside and outside
- one-piece body, made of ductile cast iron
- DVGW registrated
Type 304 with single obturator
Type 305 with double obturator
Item No. of the operating instructions : 765355_01, Issue 04.2017, 14 pages
Subject to change without notice
01/042017
Düker GmbH, www.dueker.de
1
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Table of Contents
Summary of Contents for DUKER 304
- Page 1 - completely enamelled inside and outside - one-piece body, made of ductile cast iron - DVGW registrated Type 304 with single obturator Type 305 with double obturator Item No. of the operating instructions : 765355_01, Issue 04.2017, 14 pages Subject to change without notice 01/042017 Düker GmbH, www.dueker.de...
- Page 2 1. Intended use 2. Safety precautions 2.1. General safety instructions 2.2. User safety instructions 2.3. Special risks 3. Transport and storage 4. Installation into the pipeline 5. Description 5.1. Protection against pressurised water 5.2. Technical characteristics 5.3. Flow values 5.4. Performances 5.5.
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Page 3: Intended Use
1. Intended Use After the installation into a pipe system, shut-off valves are only intended for stopping or allowing media to pass within the range of the permitted operating conditions (temperature and pressure limit "PN" labeling on the valve, unless stated otherwise). These valves are preferably intended for liquid media, such as drinking water, process water, raw and waste water. -
Page 4: Special Risks
assume any liability for damage resulting from corrosion caused by aggressive media. Neglect of these regulations may result in imminent danger to life and health, and may cause damage to the pipeline. The valve must be professionally installed into the pipeline. ... -
Page 5: Installation Into The Pipeline
5.2. Technical characteristics The underground fire hydrants Type 304 / 305 are designed to supply a minimum flow of 110 m³ per hour, at an internal pressure loss of 1 bar. - Page 6 01/042017 Düker GmbH, www.dueker.de...
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Page 7: Operation
5.4. Performances Robust, one-piece obturator, completely covered with high grade Polyurethane elastomer. Obturator designed in flow-optimized shape. Automatic draining and protection against pressurised water safely guaranteed by inside enamelling Stem bearing maintenance-free by use of 2 O-Rings. ... - Page 8 6. Dimensions Surface box DIN 4055 01/042017 Düker GmbH, www.dueker.de...
- Page 9 01/042017 Düker GmbH, www.dueker.de...
- Page 10 7. Drawings and part list 7.1. Drawing 01/042017 Düker GmbH, www.dueker.de...
- Page 11 7.2. Part list Pos. Part Material Obturator linkage, consisting of: Obturator DCI / PUR Guide piece Brass Stainless steel Bayonet claw, consisting of: Bayonet claw Ring Brass Body Bonnet Stem cap Stem unit, consisting of: Stem Stainless steel Bonnet nut Brass Sliding ring Brass...
- Page 12 For ordering the spare linkage, the necessary soil cover length of the column can be detected by the number of the markings. Close the gate valve in front of the hydrant (only for Type 304 with single obturator). perceptibly strainless. ...
- Page 13 Turn stem (Pos. 6.1) anti-clockwise, to press the obturator in the body seat. Then turn the stem clockwise till the bonnet (Pos.4) contacts either the body (Type 304) or the guide piece (Type 305). During this work please watch out for the correct placement of the O-Ring (Pos. 13).
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Page 14: Maintenance And Troubleshooting
10. Maintenance and trouble shooting Consider this chapter always together with chapter 5.5 (Operation) Regular maintenance intervals on hydrants are not required. We recommend to control the function, drainage and tightness of the hydrant at the latest every 4 years. We refer to the DVGW Leaflet W 392, Table 2, No.
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