Valvulas doble bloqueo

DIPV

Double Isolation Plug Valve

Double Block & Bleed Plug Valve

Double Isolation Plug Valve

Contents
Introduction Typical Installations Range Main Features Figure Numbering / Standards Design Features Pressure Testing Valve Data Materials Sealants Options pages 3 & 4 pages 5 & 6 page 6 page 7 page 8 pages 9 - 12 page 13 pages 14 - 19 pages 20 & 21 pages 22 - 25 page 26

2Introduction - DIPV
Double Isolation Plug Valve
Based on Serck Audco’s SUPER-H pressure balanced taper plug technology, the Double Isolation Plug Valve offers true bubble tight double block and bleed, within a single valve body. The oil and gas industry is no longer satisfied with the shut-off provided by conventional double block and bleed ball, gate or plug valves. True double isolation hasbecome a prime requirement as safety standards are raised throughout the industry, especially where it is necessary for an operator to work downstream (or upstream) of the valve. A further advantage of true double isolation (where the first plug gives complete isolation), is that the bleed point can be used to verify that no contamination has occurred when more than one type of line medium has passeddown the pipeline. The Serck Audco Super-H plug valve is widely acknowledged in the oil and gas industry for its superior shut-off at high differential pressures together with excellent reliability and durability. This same design is used in the Serck Audco Double Isolation Plug Valve.

What are the benefits?
No pipework modification - total interchangeability with existing valves. Choice ofbleed connection options. Same range as single valve - including hard facing. Meets the same industry and fire-test standards as a single valve. Low life cycle cost - less than two single valves. Assured sealing on both sides of the valve. Reduced leak paths - eliminates inter-valve pipework on double block and bleed configurations. Compact, lightweight alternative to gate valves and ball valves inseries.

Single Plug Single Isolation

Double Plug Double Isolation
Independently operated plugs mean maximum downstream isolation safety. BACK-UP PLUG PRIMARY PLUG - BUBBLE TIGHT SEAL AGAINST HIGH DIFFERENTIAL PRESSURE BLEED POINT

3

Proven plug valve integrity - setting new standards for double block & bleed
True double isolation within a single valve body

COMPARED WITH GATE VALVESSame face-to-face but smaller overall. Compact design means less weight.

COMPARED WITH BALL VALVES One DIPV replaces two ball valves. Less interconnecting pipework means fewer leak paths. Weight saving. Cost saving.

4

Typical Installations
Gas Transportation - Gas Compression Station
CONFIGURATION USING BALL VALVES

COMPRESSOR

BLEED VALVE

BLEED VALVE

CONFIGURATION USINGDOUBLE ISOLATION PLUG VALVES

COMPRESSOR

BALL VALVE

DOUBLE ISOLATING PLUG VALVE

Oil & Gas Production - Well Heads Manifold
PRODUCTION HEADER

GAS TEST HEADER

TEST SEPARATOR

OIL

SAND

FLOW LINE FROM WELL HEAD

5

Typical Installations

The valves illustrated are 8" class 1500 Double Isolation Plug Valves in 25% Cr. Duplex with hub ends. The valves are installed on aflowline header application. In this case one isolation is by electric actuator and the other isolation is by gear operator. Criteria for selection: true bubble tight isolation and space and weight saving over conventional ball or gate valves and minimum maintenance.

The valves illustrated are 4" class 300 flanged in Carbon Steel and Stainless Steel. The application is on a fuel skid and bothplugs on each valve are lever operated. Criteria for selection: double block and bleed with true bubble tight isolation for reasons of safety, reliability and minimum maintenance.

Range
inches 2 3 4 6 8 10 12 14 16 18 20 24 mm 50 80 100 150 200 250 300 350 400 450 500 600 Class 150 300 600 900 1500 2500

6

Main Features
Principles of Operation
Serck Audco Double Isolation Plug Valves...