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0000002333 00000 n All rights reserved. Using the graphs in the catalogue. Learn More, Create a Free Account for New Benefits! I'll admit I don't entirely follow your post without the catalog in front of me, but I'll take the time and see if it makes sense. var tlJsHost = ((window.location.protocol == "https:") ?
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Learn More, Get notified on new and inbound inventory, 4901 Rockaway Blvd NE, Rio Rancho, NM 87124. 0000002221 00000 n
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This Product was added to our catalogue on 21/02/2020. xb```b`` l@qAI@~iyE //>
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| If you look at the graph for the RL4 type valve the upstream pressure needs to be approx 20% above set pressure to relieve the max flow shown on the graph. - User Information Legal Enquiry Guide, 1999-2022 Alibaba.com. Please enter the article no. 
API STD 520 Part 1 (referring to the 9th ed at 5.9) has a methodology for liquid relief of non-capacity certified relief valves but not gas. I did find some old 1994 catalogue data here: Unfortunately, it's for an R4 not an RL4, but it does show that at higher inlet pressures the flow rate that the valve will pass reduces. In your case I bet if you check the graphs in the catalogue your valves may be able to relieve the required relief rate but the overpressure required to relieve this rate will be higher than your bursting disk set pressure. So, if you use one of these non-code compliant relief valves then you need to understand the limitations of what you've got. 0000007173 00000 n
Draw a line for your set pressure using same gradient as the line below (unless you have your RV set at one of the set pressures outlined in the catalogue). Stating a required size is meaningless for these valves. I say this because I'm dealing with the exact same issue. Subscribe to our monthly newsletter for coupon codes! Check what your valve can relieve at the allowable overpressure. When checking the suitability of the valve use the standard % allowable overpressure (generally 10%) and ensure that this valve is capable of relieving the relief load at allowable % overpressure. To clarify, the issue is that the valves are not capacity certifiedso that they do not comply with the ASME BPVC and you won't find them listed in NB-18 over at the National Board of BPVI: where orifice diameters and coefficients are documented. document.write(unescape("%3Cscript src='" + tlJsHost + "trustlogo/javascript/trustlogo.js' type='text/javascript'%3E%3C/script%3E")); They are typically used on chemical injection systems. 0000011338 00000 n Would anyone more conversant than Iwith the Australian PSV standard, AS1271, be able to advise whether these valves, assuming they are adequately sized, are compliant?
"https://secure.trust-provider.com/" : "http://www.trustlogo.com/"); 0000000916 00000 n 0000008032 00000 n I'm currently reviewing all installed valves and doing calcs to ensure they're adequately sized. 0000012288 00000 n I'm on a site right now which has poorly managed it's PSV inventory and has a the whole lot due for recertification at once. ${ option.value == null ? If I'm not entirely mistaken the gist of your post is that they aren't code compliant but may have the necessary capacity? But even if one of these valves was big enough, as I read AS1271 a proportional relief device is not a safety relief device. 0000001511 00000 n I think they are not compliant with regards to hydrocarbon service. Terms of Use Tmall Taobao World
7}!4im9. 0000002054 00000 n If it helps, I also found the RL3 data sheet here: I'd also suggest that when working with uncertain data sources such as this, that the approach offered by API STD 520 Part 1 at 5.12 is a sensible strategy and that is to work to a relieving capacity at a reduced flow factor. 0000071901 00000 n Low Flow in Pipes- posted in Ankur's blog. However. 0000006061 00000 n This is of little use without its associated orifice coefficient. 91 0 obj <> endobj xref 91 31 0000000016 00000 n | Affiliate, Product Listing Policy Calculating a required size using API equations or similar can not be done for these valves as they are proportional.
I'd be happy to get better data if anyone can offer it up. 0000002019 00000 n
0000001413 00000 n Check what the required over pressure is at your required relief rate and see if this is above the set pressure of the bursting disk. | Swagelok Proportional Relief Valve, High Pressure, Stainless Steel, 1/4 in. The site has a number of swagelok RL4 proportional relief devices installed, in a very one size fits all manner. 0000012022 00000 n 0000004930 00000 n conditions relevant to sizing when a capacity check is involved. - We've had incidents where secondary devices have discharged (bursting discs) under a relief scenario as the swagelok product is inadequate for the relieving flow rate. | Showroom 0000007062 00000 n All this style of relief valve are (as best as I can make out), in effect, a sprung loaded control valve. All Swagelok give you in their current catalogue is an orifice diameter. Intellectual Property Protection 0000006717 00000 n Given that I've got nothing better, I'm using the quoted Cv for my work on the expectation that the key difference between the R4 and RL4 is around the installed spring. Looking for even more savings? However I don't want to replace them with different models if not necessary. For product pricing, customization, or other inquiries. Alipay The problem with the current Swagelok data is that if you chose to extrapolate the flow curve, then you'll end up with the wrong result. Onetouch 0000085299 00000 n Alibaba.com Site: International - Espaol - Portugus - Deutsch - Franais - Italiano - - P - - - - - Trk - Nederlands - ting Vit - Indonesian - , AliExpress 0000006743 00000 n Consequently,they do not have a capacity rating at a given pressure rise (accumulation), and they are not certified to ASME or any other codes. Privacy Policy female NPT, Pressure Point Germany 2022 | Template 2009-2022 by, 190 used-refurbished compressors (Highpressure). | If you look at the graphs in the catalogue, the proportional RVs will relieve more at a higher upstream pressure. 0000004259 00000 n 0000072178 00000 n Need it ${ shippingArrivalDayOfWeek }, ${ shippingArrivalDate.format('MMM. 33010002000092 0000072652 00000 n You can always create one in a few seconds. 0000012357 00000 n | Suppliers - - | Country Search 0000068982 00000 n As can be seen from the catalogue there are only a few types. 'N/A' : option.value }. [CDATA[ Check out the catalogue an d see what you think. When doing a rating or final design relief calc, this is the data source I refer to rather than any other basis. In which case I would still have to replace them correct? Please follow this link for catalogue http://www.swagelok.N/MS-01-141.pdf. 0000005626 00000 n ${ getSpecToDisplayByCategoryAttributeId(attribute.id) }, ${ _getVar(combination, 'custom_description') }, ${ _getVar(combination, 'additional_notes') }, ${ getWarehouses().map(s => s.address + ', ' + s.city + ', ' + s.state).join(' / ') }, ${ combination.length } x ${ combination.width } x ${ combination.height }. Each type is a standard size and can be set at different set pressures for different services.
0000002333 00000 n All rights reserved. Using the graphs in the catalogue. Learn More, Create a Free Account for New Benefits! I'll admit I don't entirely follow your post without the catalog in front of me, but I'll take the time and see if it makes sense. var tlJsHost = ((window.location.protocol == "https:") ?
%PDF-1.4
%
Learn More, Get notified on new and inbound inventory, 4901 Rockaway Blvd NE, Rio Rancho, NM 87124. 0000002221 00000 n
//]]> 0000008525 00000 n
This Product was added to our catalogue on 21/02/2020. xb```b`` l@qAI@~iyE //>
startxref
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%%EOF
121 0 obj<>stream
| If you look at the graph for the RL4 type valve the upstream pressure needs to be approx 20% above set pressure to relieve the max flow shown on the graph. - User Information Legal Enquiry Guide, 1999-2022 Alibaba.com. Please enter the article no. API STD 520 Part 1 (referring to the 9th ed at 5.9) has a methodology for liquid relief of non-capacity certified relief valves but not gas. I did find some old 1994 catalogue data here: Unfortunately, it's for an R4 not an RL4, but it does show that at higher inlet pressures the flow rate that the valve will pass reduces. In your case I bet if you check the graphs in the catalogue your valves may be able to relieve the required relief rate but the overpressure required to relieve this rate will be higher than your bursting disk set pressure. So, if you use one of these non-code compliant relief valves then you need to understand the limitations of what you've got. 0000007173 00000 n
Draw a line for your set pressure using same gradient as the line below (unless you have your RV set at one of the set pressures outlined in the catalogue). Stating a required size is meaningless for these valves. I say this because I'm dealing with the exact same issue. Subscribe to our monthly newsletter for coupon codes! Check what your valve can relieve at the allowable overpressure. When checking the suitability of the valve use the standard % allowable overpressure (generally 10%) and ensure that this valve is capable of relieving the relief load at allowable % overpressure. To clarify, the issue is that the valves are not capacity certifiedso that they do not comply with the ASME BPVC and you won't find them listed in NB-18 over at the National Board of BPVI: where orifice diameters and coefficients are documented. document.write(unescape("%3Cscript src='" + tlJsHost + "trustlogo/javascript/trustlogo.js' type='text/javascript'%3E%3C/script%3E")); They are typically used on chemical injection systems. 0000011338 00000 n Would anyone more conversant than Iwith the Australian PSV standard, AS1271, be able to advise whether these valves, assuming they are adequately sized, are compliant?
"https://secure.trust-provider.com/" : "http://www.trustlogo.com/"); 0000000916 00000 n 0000008032 00000 n I'm currently reviewing all installed valves and doing calcs to ensure they're adequately sized. 0000012288 00000 n I'm on a site right now which has poorly managed it's PSV inventory and has a the whole lot due for recertification at once. ${ option.value == null ? If I'm not entirely mistaken the gist of your post is that they aren't code compliant but may have the necessary capacity? But even if one of these valves was big enough, as I read AS1271 a proportional relief device is not a safety relief device. 0000001511 00000 n I think they are not compliant with regards to hydrocarbon service. Terms of Use Tmall Taobao World
7}!4im9. 0000002054 00000 n If it helps, I also found the RL3 data sheet here: I'd also suggest that when working with uncertain data sources such as this, that the approach offered by API STD 520 Part 1 at 5.12 is a sensible strategy and that is to work to a relieving capacity at a reduced flow factor. 0000071901 00000 n Low Flow in Pipes- posted in Ankur's blog. However. 0000006061 00000 n This is of little use without its associated orifice coefficient. 91 0 obj <> endobj xref 91 31 0000000016 00000 n | Affiliate, Product Listing Policy Calculating a required size using API equations or similar can not be done for these valves as they are proportional.
I'd be happy to get better data if anyone can offer it up. 0000002019 00000 n
0000001413 00000 n Check what the required over pressure is at your required relief rate and see if this is above the set pressure of the bursting disk. | Swagelok Proportional Relief Valve, High Pressure, Stainless Steel, 1/4 in. The site has a number of swagelok RL4 proportional relief devices installed, in a very one size fits all manner. 0000012022 00000 n 0000004930 00000 n conditions relevant to sizing when a capacity check is involved. - We've had incidents where secondary devices have discharged (bursting discs) under a relief scenario as the swagelok product is inadequate for the relieving flow rate. | Showroom 0000007062 00000 n All this style of relief valve are (as best as I can make out), in effect, a sprung loaded control valve. All Swagelok give you in their current catalogue is an orifice diameter. Intellectual Property Protection 0000006717 00000 n Given that I've got nothing better, I'm using the quoted Cv for my work on the expectation that the key difference between the R4 and RL4 is around the installed spring. Looking for even more savings? However I don't want to replace them with different models if not necessary. For product pricing, customization, or other inquiries. Alipay The problem with the current Swagelok data is that if you chose to extrapolate the flow curve, then you'll end up with the wrong result. Onetouch 0000085299 00000 n Alibaba.com Site: International - Espaol - Portugus - Deutsch - Franais - Italiano - - P - - - - - Trk - Nederlands - ting Vit - Indonesian - , AliExpress 0000006743 00000 n Consequently,they do not have a capacity rating at a given pressure rise (accumulation), and they are not certified to ASME or any other codes. Privacy Policy female NPT, Pressure Point Germany 2022 | Template 2009-2022 by, 190 used-refurbished compressors (Highpressure). | If you look at the graphs in the catalogue, the proportional RVs will relieve more at a higher upstream pressure. 0000004259 00000 n 0000072178 00000 n Need it ${ shippingArrivalDayOfWeek }, ${ shippingArrivalDate.format('MMM. 33010002000092 0000072652 00000 n You can always create one in a few seconds. 0000012357 00000 n | Suppliers - - | Country Search 0000068982 00000 n As can be seen from the catalogue there are only a few types. 'N/A' : option.value }. [CDATA[ Check out the catalogue an d see what you think. When doing a rating or final design relief calc, this is the data source I refer to rather than any other basis. In which case I would still have to replace them correct? Please follow this link for catalogue http://www.swagelok.N/MS-01-141.pdf. 0000005626 00000 n ${ getSpecToDisplayByCategoryAttributeId(attribute.id) }, ${ _getVar(combination, 'custom_description') }, ${ _getVar(combination, 'additional_notes') }, ${ getWarehouses().map(s => s.address + ', ' + s.city + ', ' + s.state).join(' / ') }, ${ combination.length } x ${ combination.width } x ${ combination.height }. Each type is a standard size and can be set at different set pressures for different services.