DISCOCHECK Dual-Plate Check Valves BB Short overall length according to DIN EN 558-1, table 11, series 16 (=^ DIN 3202, part 3, series K3)

Transcription

1 pplication and Type PN pplication for liquids, gases and vapours Ø D 80 BB EN BB SME PN Class 150 suitable for heating, air-conditioning, water supply and cooling installations,for applications where minimum pressure loss is required,for frequency-controlled pumps top quality, minimum pressure loss, for horizontal and vertical installations, stable operation when partly open (horizontal), downward flow (special spring), 2 hinge pins, springs to close, disc plates with individually suspended stop lugs, swing stop for stable opening position, angle when : 80, coated or with with closing damper mm L Design Part designation Nominal size EN STM reference equivalent 1 ) Grey cast iron Body Class (BB... G) Dual plate Carbon steel Body (BB... C) Body WCB Ø D L mm (larger sizes on request) Dual plate WCB Stainless steel Body F 1 L (BB... ) Body CF 8 M Dual plate F 1 L Dual plate CF 8 M 1) Physical and chemical properties comply with EN grade. Pressure/Temperature Ratings with metal-to-metal seat EN series Type PN Grey cast iron down to C at Carbon steel down to C at Stainless steel ) down to C at SME series Carbon steel down to 29 C at nominal pressure Stainless steel ) down to C at nomial pressure Max. service pressure [bar] at temperature [ C] 2 ) BB 11G / 21G PN. 12G / 22G PN.0 1G / 2G PN BB 12C / 22C PN C / 2C PN C / 25C PN C / 2C PN BB 12 / 22 PN BB applicable up to max. 500 C. 1 / 2 PN / 25 PN / 2 PN Type Class Max. service pressure [bar] at temperature [ C] 2 ) BB 15C/BB 25C BB 1C/BB 2C BB BB BB BB ) For temperatures above + C special springs of Inconel X 750 are required. ) If the operating temperatures exceed C intercrystalline corrosion may occur. Do not subject the equipment to operating temperatures higher than C unless intercrystalline corrosion can be ruled out. Seat gasket Temperature [C ] Seat gasket Temperature [C ] EPDM up to +150 FPM (FKM) 25 up to + NBR 0 up to +1 PTFE / FPM 25 up to + (from 150)

2 Minimum volume flow [m /h] Flow X direction V V Spring type without spring with spring 7 W with spring 2 W stable partial stable partial opening*) opening*) , Values based on water at C *) Provide stabilizing leg (at least 5 times upstream and twice downstream of the equipment). If the flowrate is below the minimum volume flow (instable area) increased wear and noise are to be expected. Opening Pressures Differential pressures at zero volume flow. Flow X direction V Y Spring type without spring 7 W 7 W 1 ) 5 VO Opening pressures [mbar] ) 2W spring, opening pressure 2 mbar Pressure Drop Chart The curves given in the chart are valid for water at C. To read the pressure drop for other fluids the equivalent water volume flowrate must be calculated and used in the graph V w. The values indicated in the chart are applicable to valves equipped with standard spring 7 mbar and horizontal flow as well as valves with special spring 2 mbar and horizontal flow. ρ V W = V 0 V W = Equivalent water volume flow in [l/s] or [m /h] ρ = Density of fluid (operating condition) in [kg/m ] V = Volume of fluid (operating condition) in [l/s] or [m /h] [Imp. gal/min.] Volume flow Vw Volumenstrom flow V w Vw [m /h] [l/s] , 0, 0, 0, 1 0,5 [bar] [psi] 0,01 0,02 0,05 0,1 0,2 0, Pressure Druckverlust drop p Pressure drop p 0, 0,001 0,002 0,005 0,01 0,02 0,0 0,05 0,1 0,2 0, Required minimum volume flow V W for valves with special spring 2 W and horizontal flow. Required minimum volume flow V W for valves with standard spring 7 W and horizontal flow.

3 Dimensions and Weights EN Series PN Dimensions [mm] Weight 1 ) D L [kg] 50 2 ) 5 2 ) 80 2 ) , , , , , ) Weights rated for cast steel grade GP 2 GH (GS-C 25). 2 ) 50, 5 and 80 only available as BB... (stainless steel). Other sizes on request PN Dimensions [mm] Weight 1 ) D L [kg] , , Dimensions and Weights SME Series Class Dimensions [mm] Weight [kg] D L 2/50 2,5/5 /80 / 5/ *) *) *) *) *) *) *) *) ) ) / / , / / / / / / ) Overall length not standardized *) 50 overall length to PI 59

4 BB with lining from 150 BB with Lining pplication and Type PN pplication for liquids, gases and vapours BB..GS BB..GK PN 1 Made from grey cast iron (BB.. GS, GK) for salty fluids such as sea water for salty fluids such as sea water and for drinking water installations hard rubber coating for protection against abrasive media, thickness of coating - 5 mm plastic coating incl. inside and outside lining of the valve body, coating meets requirements of plastics for drinking water and is approved by DVGW (German Technical ssociation for Gas and Water), more features specified under BB EN / SME Component EN number SME 1 ) Body EN-JL 12B Dual plates for equipment with lining and internals made from austenitic steel CF8M Support and hinge pin Ti Hard-rubber lining Springs Ti Dual plates for equipment with lining and internals made from bronze CC2G 2 ) Support and hinge pin CW5K C51900 Springs CW52K C52 1 ) Equipment made from grey cast iron that complies with SME specification is not available. The equivalent material specifications are stated for guidance only. Physical and chemical properties of the materials can therefore differ from the materials in accordance with SME specification. For more details please contact the manufacturer. 2 ) There is no SME equivalent for the EN material. Lining materials for BB.. GS Hard rubber based on isoprene rubber (IR), shore D hardness 75±5, max. thickness of layer -5 mm. Plastic lining Dual plates, hinge pins and springs are not lined. Dual plates standard with O-rings of EPDM. Lining materials for BB.. GK Vestosint is a polyamide 12 based powder for fluidized bed sintering, shore D hardness 75±5, max. thickness of layer 0. mm. Rilsan is a polyamide 11 based powder for fluidized bed sintering and a coating powder extracted from a purely plant based source, which means that a natural, environmentally friendly and renewable raw material is used. pprovals/certificates acc. to KTW (recommendations for plastics in contact with drinking water) and DVGW (= German Technical ssociation for Gas and Water) Shore D hardness 75±5, min. thickness of layer 0. mm Other linings available on request. Temperature Limits Hard rubber lining C up to 90 C Plastic lining C up to 90 C

5 BB with Dampers *) pplication and Type PN pplication for liquids BB EN PN BB SME Class 150 e. g. for water supply and cooling installations, if waterhammer occurs in pipes conducting liquids, for preventing damage to the plant. To evaluate potential waterhammer problems please aks for our questionnaire. slows down the closing process of the non-return valve, reduces the speed of return flow, damper does not change the overall length of the equipment, dampening cylindre made of rustproof material B Component EN SME 1 ) Hinge pin Guide bush, flange, cover 1. ISI0F Gasket ISI1Ti O ring, inside NBR 1 ) The equivalent material specifications are stated for guidance only. Physical and chemical properties of the materials can therefore differ from the materials in accordance with SME specification. *) Not suitable for BB with coating Dimensions and Weights of Equipment with Closing Dampers BB with patented adjustable dampers, NPS [mm] 90 1 B [mm] 1 ) Weight [kg] 1 ) ) The indicated values are based on equipment PN 1. Specifications for other equipment types available on request. Pressure/Temperature Ratings Size [mm] [inch] Max. service pressure [bar] Max. service temperature [ C] 1 Max. admissible pressure at line leading to the valve (pump switched off) [bar] 0.5