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The GFB SV52 Dump Valve is the most compact and highest flowing blow-off valve from GFB.
300PSI and standing only 86mm tall (including the weld-on adaptor), the GFB SV52 is 10mm shorter than the nearest competitor & flows more!
Realizing that a high-flowing valve like this will see duty in some high-boost environments, GFB made sure the SV52 tops the class in that category as well, giving it an astonishing boost pressure rating of 300PSI!
BODY - The SV52’s unparalleled pressure capacity starts with a monobloc body design, CNC machined from a single aluminium billet that ensures strength without adding unnecessary bulk.
PISTON - The anodized piston bore creates an extremely hard and low-friction surface on which the single piece aluminum 52.5mm piston glides, and will continue to do so over countless cycles. It features an arrangement of Viton o-ring seals unique to GFB. One is positioned on the face of the piston to seal incoming boost pressure, the other rides in a groove on the piston that engages the specially shaped cylinder wall with varying amount of compression, to ensure optimum sealing when the valve is closed, and low friction during the opening and closing movements.
DESIGN - Why do GFB use a piston instead of the more common diaphragm design? Strength and reliability is the primary factor, something that a diaphragm simply cannot match in a high-boost BOV environment. Diaphragms have their place (GFB use them in our wastegates), as they offer low friction and good sealing capability. However, a rolling diaphragm is only designed to receive a net pressure on one side, which essentially “inflates” it against the walls of the chamber in which it resides, exactly how it is used in a wastegate. However, a BOV is exposed to frequent pressure reversals – every time you accelerate and lift off. For a diaphragm, this means it is repeatedly collapsing on itself under boost, then inflating under vacuum. Eventually, this leads to diaphragm failure. A piston on the other hand is immune to this issue, and will continue to operate under the most extreme pressure, temperature, and cyclic conditions.
The unique mounting method of the SV52 is one of the ways GFB have been able to save unnecessary bulk. By eliminating the v-band style mount, the piston and its venting ports can sit much lower, which reduces the overall height to a number others can’t match.
The v-band mounting system makes it compatible with existing common v-band flanges, but also includes a steel weld-on flange for custom set-ups.
includes 2 springs, plus a spring pre-load adjustment system so you can dial it in for optimum throttle response and boost recovery after gearshift, without resorting to the costly hit- and-miss approach of purchasing extra springs.
GFB SV52 Atmospheric Dump Valve features:
Here you will find all the information you need to know about the delivery of your purchase.
At Rival Motorsport, we pride ourselves on our efficient delivery service. If your item is in stock with us, it can arrive as fast as the next day. However, please note that each product and brand may differ in terms of stock availability, and stock statuses shown on the product page may not always reflect real-time availability.
In the event that you are in a rush for your product, we advise that you call us. Not all stock is located in the same warehouse, and we are reliant on third-party suppliers. Our team can help you identify the quickest way to get your item.
Please be aware that orders can be delayed due to factors beyond our control. From couriers to customs, we cannot always predict or prevent delays. In these cases, we are not liable for any inconvenience caused.
For smaller items, we use Royal Mail First or Second Class, depending on the item. For larger items or items of higher value, we use courier services, typically DPD. You will receive a tracking number and a one-hour time slot for your delivery.
We have established special relationships with brands from around the world, as well as in the UK. This means that even if the item you are looking for is out of stock, we will have priority access to the production queue for new items. In fact, there is a high chance that you will not find the item you need anywhere else more quickly. Our dedicated team works tirelessly to source the products you require and will always strive to get them to you as soon as possible.
Please note that we reserve the right to cancel an order if the items/delivery costs have been calculated incorrectly by our checkout system. In such cases, we will give customers the option to cover the difference if they still want the goods.
Thank you for choosing Rival Motorsport. We hope that this information has been helpful. If you have any further questions, please do not hesitate to contact us.
At Rival Motorsport Ltd, we make sure our parts match your vehicle by double-checking with the latest data from manufacturers. Sometimes, though rare, there might be small differences. So, it's smart to double-check compatibility when you get your parts. This helps avoid problems before you start fitting them.
Just so you know, if a part is marked or damaged from trying to fit it, we can't take it back. Also, we don't cover labour costs, compensation, or other expenses.
Thanks for understanding and choosing Rival Motorsport Ltd.
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Fantastic product from the best performance car shop 👌
Absolutely amazing stuff! Brilliant colour match! Just buy it!!!!!!!!! You won’t regret it
Although the product was out of stock, the Rival team was very good at accommodating getting it sorted by sending out a replacement item from a different manufacturer.
