Relief Valve Bayard DN 350

Description

• For general information concerning the operation of a Hydrobloc control valve, please consult our general manual ( series K ).
• Extensive range including two different designs:
  – XG design:
  – Large flow capacity
  – Low head loss
  – Watertight at zero flow rate
  – XGS design:
  – Particularly suitable to high differential pressures.
  – Better cavitation resistance
  – Watertight at zero flow rate.

Construction

• Self-lubricated double guided mobile unit
• Ductile iron body and bonnet
• Stainless steel seat for standard version until DN 400 XG design and DN 600 XGS design.
• Powder epoxy coating
• Stainless steel bolting
• Stainless steel pilot circuit tube and fittings
• Pilot circuit strainer with screen in stainless steel.
• Individually packed.

Easy operation and maintenance

• Visual position indicator with manual drain
• Including isolating valve (s) for pressure gauges
• Equipped with closing speed controller “RF” ( DN 50 to 300 XG design, and DN 150 to 400 XGS design ).
• Chamber isolating valve independent from the adjustment of the speed controller.
• Maintenance without disassembly from the pipeline
• Easy dismantling from the top
• Drain plug ( stainless steel ).

Product according to standard EN 1074-5

Technical Data

• Range DN 350 for XG design and for XGS design
• PN 25
• Maximum temperature +1⁰C to +65⁰C
• Seating: class A according to standard ISO 5208-2.
• Face to face dimensions according to standards EN 558-1 series 1 (except DN 1000 )
• Flange drilling according to standards EN 1092-2 and ISO 7005-2: ISO PN 10, 16 or 25 for DN 50 to 1000 ( other drillings, please consult us ).
• Fluid: drinking water or 2 mm filtered untreated water.
• Working Pressure 25 Bar.
• Vertical & Horizontal intallation.
• The valve body of PN 16 and PN25 are the same, the difference are on flange drilling and pilot circuit.

Specifications

• XGS design:
  – B^– : 606 mm
  – C^– : 657 mm
  – D^– : 278 mm
  – Weight : 250.1 kg