RE: OS&Y "flow rates"

Let us know. I'm sorry you're going through this with OSHPD, but it kind of makes me feel good that I'm not the only one. They can be pretty tough to work with and stubborn on their interpretations. From: Sprinklerforum [mailto:sprinklerforum-boun...@lists.firesprinkler.org] On Behalf Of Rocci

Re: pressure relief valve on sprinkler system

I’d say others experiences are different than mine. The factory set relief valves I’ve seen are set right at 175 psig. I’ve usually described them as most accurate item on sprinkler system. Most common reason I’ve seen this is fitter distressed over not be able to hold 200 psi, and I’m showing

RE: OS&Y "flow rates"

We were just discussing this internally and were thinking the same thing. Thanks everyone ill try some of these options and see what happens! Rocci Cetani III, CET Senior Designer Water-Based Fire Protections Systems Layout, Nicet Level III Northern California Fire Protection Services Inc.

RE: OS&Y "flow rates"

Intuition and hope tells me this undertrained inspector has recently attended a backflow class and is confusing the OS&Y on a backflow as the backflow itself. Take it as an opportunity to provide education. Good luck. Nick Maneen, SET c 704.791.7789 From: Sprinklerforum [mailto:sprink

RE: pressure relief valve on sprinkler system

And this is the Note I have seen on most of these valves: **Note: UL and FM standards for sprinkler system pressure relief valves require relief valves to operate within a range of their ratings. FM requires a relief valve to OPEN at a pressure no less than 85% of their rating and UL requires O

RE: OS&Y "flow rates"

He is probably thinking about backflow preventers and how they can effect the system. Dale F. Wingard, SET Designer Commercial/Marine Division NICET IV #76284 Water-based Systems Hiller Systems A Division of The Hiller Companies, Inc. 3751 Joy Springs Drive Mobile, AL 36693 o: 251.661.1275 Hill

RE: OS&Y "flow rates"

How about a main drain test and compare with the previous? I know it's not the real answer to his question, but it might get him off your back. From: Sprinklerforum [mailto:sprinklerforum-boun...@lists.firesprinkler.org] On Behalf Of Rocci 3 Cetani Sent: Tuesday, March 05, 2019 3:20 PM To: spri

RE: OS&Y "flow rates"

I'd first ask him specifically what he means by flow rates. I wouldn't waste any time trying to guess what he thinks he needs to know. Craig Prahl | Jacobs | Group Lead - Fire Protection | 864.676.5252 | craig.pr...@jacobs.com | www.jacobs.com

RE: OS&Y "flow rates"

LMAO!!! You can't make this stuff up. Give him the equivalent foot in 13. Figure out the loss for your flow then give it showing equal. 4 ft' of valve A = 4' of valve B. Travis Mack, CFPS, CWBSP, RME-G, SET MFP Design, LLC 3356 E Vallejo Ct Gilbert, AZ 8

RE: OS&Y "flow rates"

Oh the OSHPD guys are the BEST! Rocci Cetani III, CET Senior Designer Water-Based Fire Protections Systems Layout, Nicet Level III Northern California Fire Protection Services Inc. 16840 Joleen Way Bldg. A Morgan Hill, CA 93037 P-(408) 776-1580 EXT.111 F-(408) 776-1590 roc...@norcalfire.com

RE: OS&Y "flow rates"

He wants us to prove the existing valve and the new one are "equal" Rocci Cetani III, CET Senior Designer Water-Based Fire Protections Systems Layout, Nicet Level III Northern California Fire Protection Services Inc. 16840 Joleen Way Bldg. A Morgan Hill, CA 93037 P-(408) 776-1580 EXT.111 F-(408)

Re: OS&Y "flow rates"

They're calculated as an equivalent length, same size, same equivalent length, point him or her to table 23.4.3.1.1 (nfpa 13 2016) Mike Morey CFPS 3229 • NICET S.E.T. 123677 Project Manager • Fire Protection Group Shambaugh & Son, LP an EMCOR Company 7614 Opportunity Drive • Fort Wayne, IN • 46

RE: OS&Y "flow rates"

I've given up trying to figure people out. Some just can't be bothered. There is an equivalent foot chart in NFPA 13 for gate valves. You could give him that for reference. If he is still adamant to see a graph, you could make quick spreadsheet to calculate pressure losses based on flow

RE: OS&Y "flow rates"

The flow rate would be whatever the system demand is down stream of the valve. Richard M. Carr, SET Project Manager/Design Diboco Fire Sprinklers, Inc. 325 Jackson Loop Road Flat Rock, NC 28731 rich...@diboco.com 828-696-3400 828-696-2288 Fax 828-708-9118 Mobile [cid:

RE: OS&Y "flow rates"

What about showing him the equivalent length chart in NFPA 13 for gate valves? Mike Stossel SET [400dpiLogoCropped] 36 Barren Road East Stroudsburg, PA 18302 Office: 973-670-2627 m...@knssprinkler.com From: Sprinklerforum On Behalf Of Rocci 3 Cetani Sent: Tuesday,

OS&Y "flow rates"

So we swapped out a broken OS&Y valve at the hospital and the OSHPD inspector is insisting he wants the "flow rates" ( I assume he means friction loss) from the existing and new OS&Y valve. OS&Y valve cutsheets don't have a friction loss chart because the loss is so minimal. Does anyone have a

RE: pressure relief valve on sprinkler system

FYI, this is the Listed Globe adjustable pressure relief valve (had to get my product plug in): https://globesprinkler.com/product-detail/arv-adjustable-relief-valve John Corcoran Senior Communications Manager globesprinkler.com E john.corco...@globesprinkler.com P 989.414.2251 F 989.846.9231

RE: pressure relief valve on sprinkler system

Yeah, we've had some issues with the cheaper "factory set at 175 psi" versions. The adjustable ones work pretty well, I think. In the original poster's case, is there any reason why it would make sense to set them at anything other than 175 psi? -Kyle M From: Sprinklerforum [mailto:sprinklerfo

RE: pressure relief valve on sprinkler system

Look carefully at the pressure relief valves. The 175 PSIG rating is nominal. The can and will relieve at lower pressure. Read the manufacturer's data sheet. Thanks, John John August Denhardt, P.E. Strickland Fire Protection Incorporated 4011 Penn Belt Place Forestville, Maryland 20747-4737 3

RE: pressure relief valve on sprinkler system

Guess I overlooked that earlier. Thank you! From: Sprinklerforum [mailto:sprinklerforum-boun...@lists.firesprinkler.org] On Behalf Of John Corcoran Sent: Tuesday, March 05, 2019 10:39 AM To: sprinklerforum@lists.firesprinkler.org Subject: RE: pressure relief valve on sprinkler system Hi, Justin

RE: pressure relief valve on sprinkler system

Hi, Justin - this from Karl Wiegand in Globe's tech service group: NFPA 13, 2019 Edition, Section 8.1.2.1 states that listed pressure relief valves are required downstream of one way valves in wet pipe systems and that the relief valves should be set for 175 psi or 10 psi over system pressure,

pressure relief valve on sprinkler system

I am working on a small project where we're needing to add some pressure relief valves in a few systems that trap high pressure. We're planning to add small, listed pressure relief valves in these few areas and I'm wondering on what the standard practice is as far as pressure settings would be.