Stainless Steel Orifice Plate - 250mm x 250mm
The Stainless Steel Orifice Plate - 250mm x 250mm is a custom-fabricated flow restriction plate for onsite stormwater detention (OSD) systems. Made from Stainless steel at 250mm x 250mm x 3mm, each plate is precision-drilled to your specified orifice diameter, from 30mm to 125mm, to match your hydraulic engineer's OSD design. Corner mounting holes are pre-drilled for immediate bolted installation inside a pit or chamber.
Available with or without four stainless steel dynabolts for site convenience. The 3mm plate thickness provides the rigidity needed to maintain the exact orifice diameter under the hydrostatic pressure of a full OSD detention volume. Since 1957, Vincent Buda and Company has supplied the stormwater products that civil and drainage contractors rely on. Allow 3-5 business days from order confirmation for fabrication, then same-day or next-day delivery within the Sydney Metro. Courier delivery available Australia-wide.
Product Specifications
- Material: Stainless steel
- Plate size: 250mm x 250mm x 3mm
- Orifice diameters: 30mm to 125mm, available in 5mm increments
- Corner mounting: Pre-drilled holes for immediate bolted installation
- Optional fixings: Four x 8mm x 40mm stainless steel dynabolts, available as an add-on
- Lead time: 3-5 business days from order confirmation (custom fabricated, no returns)
- Product Drawings: See Product Drawings
Key Features at a Glance
- Custom Drilled to Spec: Each plate is fabricated to the orifice diameter specified by your hydraulic engineer, from 30mm to 125mm in 5mm increments.
- Off-the-Shelf Plate, Custom Hole: The 250mm x 250mm x 3mm plate is a standard size held in ready-to-fabricate stock, keeping lead times to 3-5 business days.
- Stainless Steel Construction: Provides long-term corrosion resistance in submerged OSD pit environments.
- Ready for Immediate Installation: Pre-drilled corner mounting holes mean the plate goes straight from delivery to the pit without additional preparation.
Primary Applications
- Onsite Stormwater Detention (OSD) Systems: Installed inside a pit or chamber to restrict peak outflow rates to the pre-development levels required by council.
- Hydraulic Engineer-Specified Flow Control: Used wherever a precision orifice diameter is required to meet a specific hydraulic performance target in an OSD design.
- Residential and Commercial Drainage Compliance: Suits stormwater management plans requiring a certified restriction device in new and remediated drainage systems.
- Retrofit OSD Installations: Custom-drilled plates allow compliance upgrades to existing pits without major civil works. See the full Stormwater collection for related products.
Pick-Ups
All stocked items are available for pickup within 2 working hours of placing your order.
Unsure if your items are in stock? Call us on (02) 9740 1500 before ordering to confirm availability.
Sydney Metro Deliveries
Courier Deliveries (Australia-Wide)
Direct-to-Door & Business-to-Business: Your goods will be unloaded using professional equipment and placed in a safe, accessible location at your destination.
Depot Delivery: Your order will be delivered to a Logistics Depot closest to your location. For details about your nearest depot, contact us on (02) 9740 1500 or sales@buda.com.au.
A1: Your hydraulic engineer specifies the orifice diameter. Every OSD system has a unique flow restriction target based on site area, rainfall intensity, and pre-development discharge rates. Provide the engineer's specified orifice size when ordering. Browse related products in the Stormwater collection.
A2: Yes, supply a dimensioned drawing before the order is placed. The default position is the geometric centre of the plate. If your installation requires an off-centre orifice, submit a drawing with exact hole location dimensions at the time of ordering.
A3: Stainless steel maintains dimensional accuracy when permanently submerged. A galvanised plate will corrode and scale, causing the orifice to enlarge over time and undermine OSD performance. Plastic plates can deform under hydrostatic load. Stainless steel holds its shape and orifice diameter for the life of the system.
A4: Yes, corner mounting holes are pre-drilled for immediate installation. Secure the plate using M8 stainless steel bolts (supplied separately) or order with the optional stainless steel dynabolts for anchor bolting into masonry or concrete pit walls.
A5: Allow 3-5 business days from order confirmation. This is a custom-manufactured item and cannot be returned or exchanged after fabrication. Delivery within the Sydney Metro is same-day or next-day once the plate is ready.
The Stainless Steel Orifice Plate - 250mm x 250mm is a custom-fabricated flow restriction plate for onsite stormwater detention (OSD) systems. Made from Stainless steel at 250mm x 250mm x 3mm, each plate is precision-drilled to your specified orifice diameter, from 30mm to 125mm, to match your hydraulic engineer's OSD design. Corner mounting holes are pre-drilled for immediate bolted installation inside a pit or chamber.
Available with or without four stainless steel dynabolts for site convenience. The 3mm plate thickness provides the rigidity needed to maintain the exact orifice diameter under the hydrostatic pressure of a full OSD detention volume. Since 1957, Vincent Buda and Company has supplied the stormwater products that civil and drainage contractors rely on. Allow 3-5 business days from order confirmation for fabrication, then same-day or next-day delivery within the Sydney Metro. Courier delivery available Australia-wide.
Product Specifications
- Material: Stainless steel
- Plate size: 250mm x 250mm x 3mm
- Orifice diameters: 30mm to 125mm, available in 5mm increments
- Corner mounting: Pre-drilled holes for immediate bolted installation
- Optional fixings: Four x 8mm x 40mm stainless steel dynabolts, available as an add-on
- Lead time: 3-5 business days from order confirmation (custom fabricated, no returns)
- Product Drawings: See Product Drawings
Key Features at a Glance
- Custom Drilled to Spec: Each plate is fabricated to the orifice diameter specified by your hydraulic engineer, from 30mm to 125mm in 5mm increments.
- Off-the-Shelf Plate, Custom Hole: The 250mm x 250mm x 3mm plate is a standard size held in ready-to-fabricate stock, keeping lead times to 3-5 business days.
- Stainless Steel Construction: Provides long-term corrosion resistance in submerged OSD pit environments.
- Ready for Immediate Installation: Pre-drilled corner mounting holes mean the plate goes straight from delivery to the pit without additional preparation.
Primary Applications
- Onsite Stormwater Detention (OSD) Systems: Installed inside a pit or chamber to restrict peak outflow rates to the pre-development levels required by council.
- Hydraulic Engineer-Specified Flow Control: Used wherever a precision orifice diameter is required to meet a specific hydraulic performance target in an OSD design.
- Residential and Commercial Drainage Compliance: Suits stormwater management plans requiring a certified restriction device in new and remediated drainage systems.
- Retrofit OSD Installations: Custom-drilled plates allow compliance upgrades to existing pits without major civil works. See the full Stormwater collection for related products.
A1: Your hydraulic engineer specifies the orifice diameter. Every OSD system has a unique flow restriction target based on site area, rainfall intensity, and pre-development discharge rates. Provide the engineer's specified orifice size when ordering. Browse related products in the Stormwater collection.
A2: Yes, supply a dimensioned drawing before the order is placed. The default position is the geometric centre of the plate. If your installation requires an off-centre orifice, submit a drawing with exact hole location dimensions at the time of ordering.
A3: Stainless steel maintains dimensional accuracy when permanently submerged. A galvanised plate will corrode and scale, causing the orifice to enlarge over time and undermine OSD performance. Plastic plates can deform under hydrostatic load. Stainless steel holds its shape and orifice diameter for the life of the system.
A4: Yes, corner mounting holes are pre-drilled for immediate installation. Secure the plate using M8 stainless steel bolts (supplied separately) or order with the optional stainless steel dynabolts for anchor bolting into masonry or concrete pit walls.
A5: Allow 3-5 business days from order confirmation. This is a custom-manufactured item and cannot be returned or exchanged after fabrication. Delivery within the Sydney Metro is same-day or next-day once the plate is ready.
Pick-Ups
All stocked items are available for pickup within 2 working hours of placing your order.
Unsure if your items are in stock? Call us on (02) 9740 1500 before ordering to confirm availability.
Sydney Metro Deliveries
Courier Deliveries (Australia-Wide)
Direct-to-Door & Business-to-Business: Your goods will be unloaded using professional equipment and placed in a safe, accessible location at your destination.
Depot Delivery: Your order will be delivered to a Logistics Depot closest to your location. For details about your nearest depot, contact us on (02) 9740 1500 or sales@buda.com.au.
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