TECOFI CB3448N Dual Plate Check Valve, Iron Body, Iron Plates

CB3448N is a Tecofi (France) wafer-type dual plate (double plate) check valve: EN-GJL-250 cast iron body, ductile iron plates, stainless steel springs, EPDM seat, 16 bar, DN40 to DN800, for hot water, cold water and compatible fluids. This page covers CB3448N only; CB4448-EP has the same design, ductile iron plates, springs and seat but a ductile iron body at every size.

Specifications

• Body: cast iron EN-GJL-250 (GG25, ASTM A48 class 40B) for DN40-DN500; ductile iron EN-GJS-400-15 for DN600-DN800
• Plates (2): ductile iron EN-GJS-400-15 (GGG40, ASTM A536 65-45-12)
• Springs: stainless steel X5CrNi 18-10 (AISI 304)
• Hinge pin and stop pin: 13% Cr stainless steel X12Cr13 (AISI 410)
• Bearings: PTFE; plugs: stainless steel; eye bolt (DN200 and larger only): carbon steel
• Seat: EPDM
• Connection: wafer, between PN10/16 flanges (EN 1092-1, ISO 7005-1) / ASME B16.5 Class 150
• Size range: DN40 đến DN800
• Max. working pressure: 16 bar; back pressure for sealing: 2 bar
• Working temperature: -5°C / +120°C

Dimensions, weight and order codes

L is the face-to-face length (column B of the datasheet). A “—” means the order code of that size is not in CAD’s current list; contact CAD to check.

Difference from CB4448-EP

• EN-GJL-250 (GG25) cast iron body at DN40-DN500, EN-GJS-400-15 ductile iron at DN600-DN800; CB4448-EP has an EN-GJS-400-15 ductile iron body at every size.
• Same ductile iron EN-GJS-400-15 plates, 304 stainless springs, 410 stainless hinge and stop pins, EPDM seat, 16 bar, -5°C / +120°C and DN40-DN800 as CB4448-EP.
• The datasheet gives one weight table for both codes (for example DN100: 4.38 kg).
• Unlike the CB3449-EPA / CB4449-EA family: the plates here are ductile iron (not 316 stainless), the springs are 304 stainless, the seat is plain EPDM (not EPDM ACS) and the temperature is -5°C to +120°C.

Applications

The datasheet names pumping, water supply, air conditioning and heating, chemical industry and hydraulic installations. Fluids: hot water, cold water and compatible fluids. Suited to unloaded fluid transfer under regular, non-pulsating conditions.

Standards / Approvals

• Design to EN 16767; meets the requirements of the Pressure Equipment Directive 2014/68/EU (module H).
• Face-to-face length to EN 558 series 16.
• Mounting between PN10/16 flanges to EN 1092-1 and ISO 7005-1, in line with ASME B16.5 Class 150.
• Hydraulic tests to EN 12266-1, DIN 3230 and ISO 5208: body 24 bar, seat 17.5 bar.
• Body coating: epoxy powder RAL 5015, 250 microns, corrosion protection class C5 (medium durability, C5M) following NF EN ISO 12944.
• The Product approvals section of the datasheet does not name a certificate in text.

Installation

• Can be mounted on horizontal or vertical pipework; the arrow on the body shows the flow direction.
• For horizontal mounting the valve axis must be vertical; for vertical mounting the flow is upward.
• Keep a straight run of 3 to 5 times the minimum diameter upstream and downstream of an elbow or appliance to stay out of turbulence that increases wear.
• At a pump discharge, follow FD CEN/TR 13932.

What to send for a quote

• Product code or order code (for example CB3448N-EP0100)
• DN size (mm) and flange standard (PN10, PN16 or ASME Class 150)
• Fluid, working pressure and temperature, mounting position (horizontal or vertical)
• Quantity

CAD replies with a quote within 24 working hours.

Technical documentation (datasheet)

• Datasheet CB3448N