MULTI NB Inclined Flap Valves

Protection against drainage & sewage backwater/flooding. Inclined Flap Valve (minimum 15°) designed to be installed at the end of pipelines, either on vertical walls or directly onto the end of the pipe, to prevent backflow in sewage and drainage systems. Mounting Kit included: Stainless steel mechanical anchors are provided as standard for vertical mounting.

Multiple sizes from 7.87" - 59.06"

COMPONENTS:

  • Body & Flap: Glass reinforced plastic using a isophtalic polyester resin
  • Seal: EPDM rubber
  • Mounting Kit: Stainless steel mechanical anchors

  • Integral foamed EPDM rubber gasket for direct fixing to a flange or headwall
  • Stainless steel mechanical anchors are provided as standard for vertical wall mounting
  • For flange ISO PN 10 use standard stainless steel bolts and nuts (not provided)

Reliable and Durable

High mechanical strength due to Glass Reinforced Plastic (GRP) construction. Design is verified by Finite Element Stress Analysis

Watertight

Resistant up to 1 bar (10 m head) and back pressure to 1 bar (10 m head) . Integral rubber seals easily replaced if damaged.

Lightweight

Fast and easy installation. Most sizes can be handled by one person. Very low operating pressure (cracking head) compared with metal flap valves.

Corrosion Resistant

Highly resistant to corrosion and UV Degradation. No coating needed.

Resilient

Natural rubbers provide resistance to ozone, UV and mechanical compression.

Low Maintenance

Long service life and low maintenance.

Quality

Conforms to ISO 9001 quality standards.

  1. Reliable and Durable
  2. Watertight
  3. Lightweight
  4. Corrosion Resistant
  5. Resilient
  6. Low Maintenance
  7. Quality

MULTI NB Series

A-PIPE OD B-PIPE OD C-DEPTH OF SOCKET MAX JOINT DEFLECTION ANGLE WEIGHT MAX Coupling OD Range min MAX Coupling OD Range max Larger Pipe ID min Larger Pipe ID max Smaller Pipe OD min Smaller Pipe OD max Sewer Main Wall Thickness Lateral Pipe min Lateral Pipe max Core Drilling min Sewer Main Core Break min Sewer Main Core Break max Foam Qty Required DIM. A DIM B DIM C DIM D DIM E DIM F Weight Pressure Resistance Pipe O.D. 2 Bushings (TWP) Pipe O.D. 1 Bushing (SCH 40) Pipe O.D. No Bushings (DI) Inside Core Drilling I.D. Installation Depth (Min) GG Part Part
13.50 in13.50 in5.91 in7.09 in3.19 in11.22 in3.53 lbs1 bar (33 ft head)MULTI 200 NB
15.55 in15.55 in6.30 in9.65 in3.07 in13.35 in4.63 lbs1 bar (33 ft head)MULTI 250 NB19102
17.64 in17.64 in7.28 in11.42 in3.15 in15.75 in8.16 lbs1 bar (33 ft head)MULTI 315 NB19122
22.44 in22.44 in8.07 in14.76 in3.90 in18.82 in13.89 lbs1 bar (33 ft head)MULTI 400 NB19145
26.61 in26.61 in9.45 in18.46 in4.02 in23.19 in22.05 lbs1 bar (33 ft head)MULTI 500 NB
31.02 in31.02 in11.02 in23.35 in3.66 in28.23 in31.53 lbs1 bar (33 ft head)MULTI 600 NB
39.49 in36.81 in17.72 in27.56 in4.72 in40.55 in110.23 lbs1 bar (33 ft head)MULTI 700 NB
44.29 in40.75 in20.59 in31.50 in4.72 in56.69 in165.35 lbs1 bar (33 ft head)MULTI 800 NB
52.36 in49.76 in19.49 in39.88 in4.33 in55.12 in231.49 lbs1 bar (33 ft head)MULTI 1000 NB
60.04 in56.69 in27.17 in47.24 in5.12 in63.78 in418.88 lbs1 bar (33 ft head)MULTI 1200 NB
69.69 in64.57 in31.50 in55.12 in4.72 in72.44 in595.25 lbs1 bar (33 ft head)MULTI 1400 NB
73.23 in68.50 in33.66 in59.06 in4.72 in77.95 in716.50 lbs1 bar (33 ft head)MULTI 1500 NB

MULTI NB Series

GG PartPartDescriptionCase Qty.Case Wt.
MULTI 200 NB8" flange or headwall13.53 lbs
MULTI 250 NB1910210" flange or headwall14.63 lbs
MULTI 315 NB1912212" flange or headwall18.16 lbs
MULTI 400 NB1914516" flange or headwall113.89 lbs
MULTI 500 NB20" flange or headwall122.05 lbs
MULTI 600 NB24" flange or headwall131.53 lbs
MULTI 700 NB28" flange or headwall1110.23 lbs
MULTI 800 NB31" flange or headwall1165.35 lbs
MULTI 1000 NB39" flange or headwall1231.49 lbs
MULTI 1200 NB47" flange or headwall1418.88 lbs
MULTI 1400 NB55" flange or headwall1595.25 lbs
MULTI 1500 NB59" flange or headwall1716.50 lbs