Oliver Forum

4" & 6" DBB valves

Benjamin — Tue, 03 Jan 2012 14:12:10 +0000

Hi,

Anyone got Oliver Twinsafe 4" & 6" DBB valves, flange end connection schematics drawing. Any material will do.

can share please?

Needle valves

AJIT — Thu, 29 Dec 2011 13:12:41 +0000

I am planning to use Needle valve for hydrocarbon line (5 barg, 50 deg.C). MOC is decided as SS-316L. Code considered is En-ISO-15761. Size (1/2" - 1 1/2").
What type of body construction to be indicated in datasheet?
What type of body-bonnet joint?
Integral seat is OK?
Cl-800 valve - what is the hydro-test pressure and pneumatic test for seat?
Appreciate prompt clarifications on above issues.
Thanks & best regards,
Ajit.

Needle Valve Differences (reply)

PE_Shillito — Fri, 26 Nov 2010 13:47:50 +0000

There are actually a number of differences between subsea and topside valves. The three most significant ones are:-
Firstly, in a topside valve, the gland or spindle seal is normally adjustable whereas in a subsea valve a non-adjustable seal is used.
Secondly, the subsea valve has environmental seals to prevent the ingress of seawater into the valve operating threads and onto the spindle seal.
Thirdly, a topside valve is normally operated by hand. Whilst some subsea valves can be operated by hand, the most common method is to use a ROV, or remotely operated vehicle. This presents its own set of problems because the subsea valve has to be â€˜robustâ€™ enough to cope with the output torque of the ROV.

If you have any other questions, feel free to ask here on the forums or on the Q&A sections on our product pages.

Thanks,

Peter

Needle Valve Differences

RettaB — Fri, 26 Nov 2010 13:29:52 +0000

I'm curious about the differences between topside and subsea needle valves. I know that the subsea valves will be watertight, but are there further differences that distinguish a subsea valve over a topside valve?

Thanks,

Retta

Please do confirm (reply)

cburroughs — Mon, 02 Aug 2010 13:21:28 +0100

316Ti is similar to 316L except that 316Ti has better high temperature strength, and mechanical strength. Used for equipment exposed to aggressive corrosive conditions and high temperature applications.

Under most conditions it can be taken that the two grades are interchangeable, 316L (316S11/1.4404) being suitable for applications where 316Ti (320S31/1.4571) is specified. In aqueous corrosion media or environments at ambient temperatures, there is no practical advantage in specifying the 316Ti type in preference to the 316L. In some circumstances the 316L (1.4404 / 1.4432) grades may be better choices.

Hope this is of some assistance.

Please do confirm

raees@ueccontrol.com — Mon, 02 Aug 2010 12:39:40 +0100

I have quoted the SS 316L material for manifolds, while customer is asking for SS 316Ti, could you please clarify, what is basic difference between them?

MSS-SP-105 Conformance (reply)

PE_Shillito — Wed, 28 Jul 2010 13:00:14 +0100

Oliver Valves Ltd can manufacture instrument valves in accordance with the requirements of MSS-SP-105.

If you have any other questions, feel free to post them here on the forum, or by emailing sales@valves.co.uk.

Thanks,

Peter

MSS-SP-105 Conformance

tayfos — Tue, 27 Jul 2010 20:28:13 +0100

Please verify that Oliver valves are in conformance with MSS-SP-105

Thanks

Please do confirm (reply)

cburroughs — Tue, 20 Jul 2010 07:39:45 +0100

Yes 316L is available and I can confirm that all Oliver Valves 316 Stainless Steel is DUEL CERTIFIED to both 316/316L.

If you request 316L in your enquiry, we can make sure that this is the material quoted.

If you have any other questions please do not hesitate to post here or contact us at sales@valves.co.uk

Please do confirm

raees@ueccontrol.com — Tue, 20 Jul 2010 06:56:29 +0100

I have quoted Y34S model in a project. But client is asking to change the manifold material as S=316L Stainless steel. But i didn't found it in the manual. Please do confirm, is it available?

Minimum working tempearture of Y34S 3 valve manifold (reply)

P_Shillito — Mon, 12 Jul 2010 09:28:18 +0100

The Y34S needle valve manifold is suitable for a minimum working temperature of -50degC.

Minimum working tempearture of Y34S 3 valve manifold

raees@ueccontrol.com — Mon, 12 Jul 2010 07:55:53 +0100

We are sole representaive of Yokogawa in pakistan. We have offered oliver 3 valve model # Y34S, client have a question that what is the minimum temperature range. Can it work on -40 dec C? please do confirm.

316Ti stainless steel (reply)

PE_Shillito — Mon, 07 Jun 2010 12:13:53 +0100

No we don't. We have occasionally seen requirements for this material, more often than not from Germany, but it is not widely available in the UK. The Ti means that a small amount of titanium has been added to the material to improve its mechanical strength at high temperatures (greater than 600C) and resistance to intergranular corrosion after exposure to high temperatures.

316Ti stainless steel

Kafuka — Mon, 07 Jun 2010 11:24:19 +0100

Do you manufacture your needle valve manifolds from 316Ti stainless steel?

Pressure Equipment Directive (Updated: 07th October 2010) (reply)

PE_Shillito — Mon, 10 May 2010 13:39:26 +0100

No, the valves produced by Oliver ValveTek are used on christmas trees and piping manifolds. These are excluded from the Pressure Equipment Directive (D.T.I. Guidance Notes on the UK Regulations, April 2005 Annex A).

However, many of the Oliver Valves and Oliver Twinsafe products comply with the Pressure Equipment Directive. If you ask when ordering, we can confirm for you.

Also, you're right in that we do get asked that fairly often. Thanks for asking though. Any more questions, feel free to post again on here or contact us by any of the means on here.

Pressure Equipment Directive

MelisaP — Mon, 10 May 2010 12:46:08 +0100

You may be asked this fairly often, but I'd still like to know:

Are the subsea valves produced by Oliver ValveTek in compliance with the Pressure Equipment Directive?

Subsea Water Depth (reply)

PE_Shillito — Tue, 04 May 2010 16:02:39 +0100

Thanks for your question Marcel.

Currently, our actuators are design and qualification tested to 10,000FT at 3,050M. This is limited by our current hyperbaric test chamber capacity. However there is no reason why we cannot develop a deeper water chamber!

I hope this answers your question. Any more questions, feel free to post again on here or contact us by any of the means on here.

Subsea Water Depth

MarcelPundit — Tue, 04 May 2010 14:03:57 +0100

Hello there. A little question to the guys at valvetek: What is the maximum water depth that your actuated subsea gate valves are qualified for?

Tahnks in advance,

Marcel Pundit

5 Valve Manifolds (reply)

PE_Shillito — Mon, 26 Apr 2010 13:00:58 +0100

5 valve manifolds are primarily used when dealing with hazardous chemicals and hydrocarbons. The additional valves are then used for safe venting and/or calibration.

Thanks for your question.

5 Valve Manifolds

JimmyJimmy — Mon, 26 Apr 2010 08:39:25 +0100

I understand the uses of 3 valve manifolds, but what application would warrant the use of a 5-valve manifold? I'm a little confused as to what the additional 2 valves would be used for.