Check-Flex G5 Inline Check Valve

The Check-Flex® G5 valve is the latest generation of inline check valve and offers a smooth upstream profile.

The G5 is built from radial layers of fabric reinforced rubber, which are hot vulcanised into a single piece valve. The unique fold away design of the inner sleeve delivers near full port flow and fast drainage.

The materials used are rated for severe service including unscreened highway run off and even steam detergent wash down areas in food plants. The fibre reinforcement prevents tearing from glass shards, grit and debris. The neoprene will flex without fatigue in the same way as a tyre flexes each rotation.

The one piece design allows the valve to flex without the point stress of older three piece assembled design. The valve combines a Sealing Gasket, Moving Flap and Container into a single integrated product. There is no hinge mechanism to be maintained.

Sealing directly to the pipe means no work to the existing wall opening or benching. Angled pipe openings, ring manholes and damaged pipe ends, need no extra work as the installer can recess the valve into these pipes to make the valve-to-pipe seal.

The tough one piece reinforced construction is offers long life in all drainage locations, including coastal and saltwater areas without periodic maintenance.

The low headloss and fast installation with hand tools means these valves are a simple addition to any property to protect against public sewer surcharging, flooding and odours. These valves are often fitted to car park drains in retail and commercial sites to prevent odours and flooding.

Flanged models are available and these are ideal for connecting to mating flanges on process tanks and pipework. In civil headwalls, the flange bolt circle may meet the end of the pipe and compromise the connection. Insert Direct to Pipe models have the same pressure rating and are the most common connection choice.

The Check-Flex G5 requires no external power and is silent in operation. The valve has a virtually instant response to backflow and is suitable for odour control applications.

IDP model

Insert Direct to Pipe wth Universal Clamp for simple and secure installation

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The expanding C-Clamp of the Check-Flex® G5 valve can used in either the Inlet End or the Discharge End of the valve.

Simply insert the clamp and expand to create a watertight seal to the pipe wall.

Sealing directly to the pipe means no work to the existing wall opening or benching. An- gled pipe openings, ring manholes and damaged pipe ends, need no extra work as the installer can recess the valve into these pipes to make the valve-to-pipe seal.

The expanding C-Clamp uses the valve wall as a gasket to seal against the bore of the pipe. The valve-to-pipe sealing method works on drainage pipes with slight out of round- ness and surface imperfections.

IE or DE Flanged model

Inlet End and Discharge End models

Flanged models connect to mating flanges on existing pipes. There is no difference in the pressure rating of the flanged models compared to the IDP models.

In civil headwalls, the bolt circle may meet the end of PCC pipes and this should be checked to ensure sufficient embedment clearance for anchors.

The thick [27-40mm] rubber flange is the sealing. There is a retaining plate encapsulated within the rubber. Any flange drill pattern is available to order.

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Check-Flex® Gen5: the modern design

Simple Expanding Clamp
The expanding C-Clamp uses the valve wall as a gasket to seal against the bore of the pipe. The valve-to-pipe sealing method works on old drainage pipes with slight out of roundness and surface imperfections. Installers will easily achieve an effective and secure valve connection in challenging conditions.

Complete Roof Support
The latest generation of inline check valve has a smooth up- stream profile with a full 150° roof connection along the length of the valve. This integral roof support can only be made with vulcanised construction. This large roof support means long-life as the internal upper half cannot sag . The angled fold away flap is free to move and expand to create a tight seal over millions of cycles, without point stress, simi- lar to a car tyre. And most important - there are no pockets for debris to collect.

Encapsulated Steel Wire Wound Core
The G5 is built from radial layers of bias rein- forced rubber (can move in one direction only), which are hot vulcanised into a single piece valve. The central core of the valve is also reinforced with steel wire fully encapsulated within the walls of the valve. The bias reinforcement allows the expanding clamp areas to expose and seal to the pipe wall, without lengthening the valve.

Large Sealing Area the large sealing area works to seal around grit. The fibre reinforcement is a rip-stop against glass shards in road drainage. The rubber material can handle the typical abrasion in drainage without significant wear with a maximum recommended pipe velocity of 5.0 m/s. The 150°upper roof connection and lower large seal anchor the angled fold away flap as it expands under back pressure.

Variable Angle Design
The G5 design uses the optimum angle for best performance in each size valve. The shallow angle in small 100-225mm valves gives markedly better low flow performance while retaining high maximum back pressure rating. In larger valves the backpressure rating in improved with a steeper angle.

Design Life
Check-Flex valves are designed for long life without maintenance. The standard two year warranty and this can be extended to five years. Measurit have sup- plied rubber valves since 1989 and many valves are in service since the 90’s.

Check-Flex® G5: the modern design

Standard [Option]

Nominal Diameter
100mm-2300mm to suit specific pipe internal diameter

Elastomer                        
Neoprene to ASTM D2000: 5BC520 A14 C12 Eo34 G21 Z1 Z1= flame resistance per ASTM C1166

Meets and exceeds:
D412 modulus (300%)
D573 heat age test D1171 ozone resistance

Option:
[EPDM]

Clamp
316 Stainless Steel EN 1.4404 [Duplex EN 1.4410, EN 1.4462]

Pipe Connection
Insert Direct to PIpe [encapsulated flange]

Flushing Pressure
200-400mm: 60-50% pipe Ø, 450-1000mm: 50-40% pipe Ø

Headloss
See Specific Size Curve

Max Temp
100°C [150°C]

Min Temp
-45° C [-50°C]

Max Back Pressure
6.1m [available higher max rating depends on valve size- to 15m]

Max Pipe Velocity
5.0 m/s [10 m/s]

Service
Foul service 225-2300mm
Stormwater 100mm-2300mm
Odour Control 100-2300mm

-  Complete flow data for any application is available on request
-  Valve performance data verified at Utah Water Research Laboratory
– The valves can be installed in any pipe orientation
-  Insert Direct to Pipe IDP valves have the same flow and pressure rating as flanged valves.
- IDP valves are easily fitted to ring manholes and quay walls
- Valves are delivered to match specific pipe inside diameter (bore)
- Fast delivery: sizes DN100 - DN1200 next day shipping from Ireland (EU)

Download Drawings

Pipe DN

Model

STEP File

PDF File

100mm

CF-IL-G5-S0100-NN-316-IDP

150mm

CF-IL-G5-S0150-NN-316-IDP

200mm

CF-IL-G5-S0200-NN-316-IDP

225mm

CF-IL-G5-S0225-NN-316-IDP

250mm

CF-IL-G5-S0250-NN-316-IDP

300mm

CF-IL-G5-S0300-NN-316-IDP

350mm

CF-IL-G5-S0350-NN-316-IDP

375mm

CF-IL-G5-S0375-NN-316-IDP

400mm

CF-IL-G5-S0400-NN-316-IDP

450mm

CF-IL-G5-S0450-NN-316-IDP

500mm

CF-IL-G5-S0500-NN-316-IDP

525mm

CF-IL-G5-S0525-NN-316-IDP

565mm

CF-IL-G5-S0565-NN-316-IDP

600mm

CF-IL-G5-S0600-NN-316-IDP

675mm

CF-IL-G5-S0675-NN-316-IDP

700mm

CF-IL-G5-S0700-NN-316-IDP

750mm

CF-IL-G5-S0750-NN-316-IDP

800mm

CF-IL-G5-S0800-NN-316-IDP

900mm

CF-IL-G5-S0900-NN-316-IDP

1000mm

CF-IL-G5-S1000-NN-316-IDP

1050mm

CF-IL-G5-S1050-NN-316-IDP

1100mm

CF-IL-G5-S1100-NN-316-IDP

1200mm

CF-IL-G5-S1200-NN-316-IDP

1350mm

CF-IL-G5-S1350-NN-316-IDP

1500mm

CF-IL-G5-S1500-NN-316-IDP

1650mm

CF-IL-G5-S1650-NN-316-IDP

1800mm

CF-IL-G5-S1800-NN-316-IDP

ILDF-G5

CF-ILDF-G5-Discharge Flange

ILIF-G5

CF-ILIF-G5-Inlet Flange

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Key Features

  • Seals to pipe inside wall
  • Easily fitted to existing drainage
  • Low cracking pressure 25-50mm
  • Low flushing pressure for fast drainage
  • Tough single piece vulcanised construction
  • Rubber material (Chloroprene) to ASTM standard

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