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Hi guys, When the process fluid is specified as TOXIC in the data sheet, it is required to use Dual Mechanical Seals? Could you explain the degree of toxicity of the process fluid for it to require dual seals rather than just a single seal. Currently I am working on data sheets where it...

Hi guys, In Plan 23, who normally dictates the cooling water requirements such flow, temp, pressure. Is it the supplier or is there also a section on API 682 where it dictates the CW requirements? Thanks, Virata

Dear everyone, I want to consult you guys on this. I asked a package vendor (for a chemical injection package) to provide me both Differential Pressure and NPSH for the metering pump. However, the vendor says this is not required because the suction is flooded. See below: For the differential...

Hello there, Does anyone of you have an IOM of a Clyde Union OH centrifugal pump? Here is the pump model:SPXFLOW Clyde Union 3 x 4 x 16B pumps. We are needing this to look into how the impeller is being replaced at site. Thus, the disassembly and assembly notes from the IOM would greatly help...

Hi guys, I have an ATEX-rated air operated double diaphragm pump including the air filter regulator and PSV. On the area classification plot plan, it is shown that it is under Cl 1, Div 2. My AODD is fine I believe since it is ATEX rated already. How about the instruments included in this...

Hi guys, I'd like to know what is the impact of having a 100-hp motor of 1.25 service factor. In our motor data sheet it is 1.15 SF. Is 1.25 SF safe to use and acceptable? Kindly let me know your thoughts. Thanks, V.

Hey guys, Are there any AODD pump models that can comply to a maximum suction pressure of 150psig (this is due the pump is designed to a design to the maximum pressure of the source vessel. Some pump vendor can only limit there max suction pressure to 5 psig. Also, are there any options to...

Hello guys, I have a question regarding Vessel sizing (an Air Receiver within Air Compressor Package). The vendor got back to us and said that they need to know three things: 1) Retention time 2) Beginning Pressure 3) Ending pressure at the end of retention time (and also flow at this period)...

Hello guys, I have a question, how do vendor winterize a pump? This pump is an AODD pump. Thank you and hope to get some response from you. Regards, Virata

Hello guys, I would like to know the difference of Garlock Fawn Gylon to "Modified Teflon" in terms of its properties and usage. They seem to be the same let me know what is the advantage over the other and vice versa. Modified Teflon seems to be generic I guess. Hoping for your prompt...

Hello gents, Our project specification has a specified maximum limit for suction specific speed which is 12000 (for less than 30kW) and 11000 (for greather than 30kW). Our vendor had offered Nss over the specified Nss for 4 pumps and told us that these are their best selection. Is this...

Hello guys, Our specification specified that the ratio of rated impeller to its max impeller size is to be less than of equal to 98%. Our vendor has offered with 98.4% impeller ratio. Also its pump motor are VSDs and thus the speed can be increased to mitigate this as Vendor stated. Is this...

Hey guys, It's me again. I have a question about seal chamber of OH1 pump type. The datasheet indicated that pump will be of "Plan 11" and the seal chamber is "taper bore". The vendor told me that Plan 11 is not offered for taper bore stuffing box hence they offered PLan 02/61. My question is...

Hey guys, Can you tell me what are the applicable and required in the material section in the datasheet to input? or what the vendor can provide for the pump I described below. See attached. I am preparing for the mechanical datasheet for a sanitary lift pump (fully submersible pump, most...

Hi guys, I would like to know what is the significance of having an Air breather for pump (OH1) bearing housing vent? The means of lubrication is flooded. The pump vendor deviates to this requirement. Appreciate all your input. Thanks and Regards, V.

Hi there, If the pump (centrifugal) flow rate is changed, will the NPSHA (also the suction prerssure?) be also affected? Does this has to do with the affinity law? Let me know your thoughts. Thanks, V.

Hi guys, I would like to know the major differences of these two pump standards. Datasheets are requiring ASME B73.1, however, one vendor is alternatively offering pumps in accordance with ISO 2858/5199? Is this acceptable? Let me know your thoughts. Thanks.

Hi Everyone, Am converting tank datasheets with British Codes and Standards to US. Please see below. - BS EN 13280 : 2001 (Category B sectional tank) - BS EN 13280 paragraph 7.4.1.3 - BS EN 13280 paragraph 7.5.1 - Leak Test - BS EN 13280 paragraph 7.5.2 - Deformation Test - BS EN 13280...

Hi guys, Just want to know what is the equivalent material of the following to US Standards (ASTM) - BS 1506 630 790 - BS 970 080 M40 - *Stainless Steel - 1.4401 to EN 10088-3:1995 - *Carbon Steel galvanised to BS EN ISO 1461 - *Mild Steel - S275JO to EN 10025-1 and -2:2004 galvanised to BS EN...

Hi everyone! What operating/design condition does an "Integrally reinforced nozzle/opening" is used? From what I've read, this type of opening is normally used in lethal, cyclic, and hydrogen services - correct me if i'm wrong, and why is that so? What are other operating conditions/procedure...