Recent content by GB67

Rangeabilty is the ratio between the minimum and the maximum controllable Cv It's impossible to calculate the rangeability of a valve from valve data sheets or drawings It must be calculated measuring real Cv max and Cv min Regards

Hello do anyones know an intenrational standard for valve testing in high temperature for metal seated valves? Both API 598 and EN 12266 specifiy fluid temeprature between 5°c and 50°C Then I expect that the leakrates specified in API 598 cannot be applied also at high temperature test. I'm...

I found here in the website some documents form Worcester but still no copy of the official certificate http://www.flowserve.com/eim/v/index.jsp?vgnextoid=97eb2fa9c39f8010VgnVCM1000005e191eacRCRD&vgnextfmt=default

JimCasey: do you have such certificate for Worcester BV? Or it's avialble on th web? It would be interesting so see one of these certificate to check the working conditions and the perfomrmaces certified therein.

I got some information form internet. The company ORTON also seems to get SIL 3 approval http://www.truflointernational.com/company/newsDetail.asp?ID=151 Also Tyco annunced that they have doing "something" in this fild since 11/2006 but now still no any new. It would be interesting to know...

I have customers that are asking for SIL (safety integrity level) certification on industrial valves. I don't have experience on this filed I read some technical notes and the reference ISO / EN (EN 61508, EN 62061, prEN ISO 13849-1) standards and not it's clear to me what is SIL. By I still...

ISO 10497 is valid also for metal to metal seated valves?

The reparation procedure is a normal part of the production process of a casting. Then it's nothing strange that a casting have been reparired that it's quite normal. The point it's not the condition of the casting before the reparatiuon but what is the quality after the reparation. A casting...

Do anyone know if this ISO 10497 apply also to metal to metal seated valves?

@anegri. For temperature range this the old question. What is RT? Now it's a common consensus that RT is not 20°C but a range between -10°C and +40°C This becasue if you take RT = 20°C then you cannot use WCB / A105 for +19°C (despite to ANSI B 16.34 in EU you cannot use WCB under RT because...

Try also SAR range of AUMA actuators (multiturn) or the equivalent for quarter turn. Information on www.auma.com

The valve size tested was DN 8" ANSI 600 It was for on - off service Temperature range: -10 / + 200°C Cycles number: 1500 According to ISO 15848 it's no sense to qualify a big valve because you will leave unqualified the lower sizes. Regards.

Hi to all. I've already followed a qualification for of valves according to this ISO draft. Nothing really new. Now TUV to qualifiy valves according to TA-Luft already require also to follow the procedure specified in this ISO draft. I followed this qualification last year for TYPE testing...