Paste Backfill Borehole Emergency Dump Valve

key features

  • Valve Size: 4” to suit both 5”, 6”, 8” & 10” delivery retic systems.

  • Pressure ratings to suit 20 thru to 250 Bar systems

  • ZERO Dead Leg between piston face and pipe bore

  • Crust breaking action to quickly open a flow path in partially impacted systems

  • Pneumatically actuated configurations preferred for safe operation in remote control situations

  • Simple mounting into overhead reticulation systems


Paste system blockages resulting from solidification and segregation are a key area of frustration for mining companies operating paste delivery systems as they typically lead to lengthy downtime and expensive remedial works to clear the blockages.

The design of this valve provides the ability to dump residual paste and flush fluids away from the stope delivery point on demand or in an operational upset condition.

As an emergency/safety device in pipe burst or over-pressurisation situations you also need absolute confidence that the technology you choose will perform on demand and itself not become a point of blockage like alternate dump valve technologies currently on the market.



Body Design

60° Y Pattern Outlet Piston Valve

Construction Type

Forged Body

Design Codes

ASME B16.34, ISO EN12516

Testing Specification

API 598 & ISO EN12266

Certificate of Compliance

PED 97/23/EC

Operator Type

Pneumatic – Double Acting


High Strength – Anti-Blowout Design


316SS + TC – Min. 150μm Thickness

Valve Size Range

4.0” / DN100

Working Pressure (max)

100, 150 & 250 Bar Designs

Pipe Connection

RF & RTJ Flanged or Victaulic

Mounting Spool NB Sizes

100, 125, 150, 200 & 250

Mounting Spool Pipe Schedule

80, XS, 120, 160 & XXS

Mounting Spool Pad Flange

4.0” ANSI 600# / 900# / 1500#

Mounting Spool Length

500 (mm) or 750 (mm)

Dump Flow Rate (max).

100NB @ 14.3 ℓ/sec

contact us


Whether planning a new project or looking to upgrade your current flow system, get in touch to discuss the best possible solution for your current process.

Please submit your enquiry here.

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9 Quandong Street,
Meridan Plains
QLD 4551

T:  +61 (0)7 5438 8255

M: +61 (0)418 606 255