GE 28000 Technical Specifications

GE Oil & Gas

Masoneilan* Valves

28000 Series Varipak
Control Valves

Precise Microflow Valves
with Compact Design
and Flexible Capabilities

Technical Specifications

10/2012

Table of Contents

Numbering System ............................................................................................2

Anti-Cavitation Varipak .................................................................................9

Varilog

Micro-flow Control Innovation .....................................................................3

General Data ........................................................................................................4

Materials of Construction .......................................................................... 5-6

Standard Flangeless Varipak ......................................................................................7

Standard Flanged Varipak ........................................................................................... 8

Numbering System

1st

2

Actuator Type

27 Air-to-Close
28 Air-to-Open

Body

Series

28

1st

2

8

Actuator Mounting

Position

0 Undefined

1 (*) (**)

2 (**)

3

4

*

Standard actuator
mounting
arrangement

**

Flanged valve

mounting position
Face-to-face =
102 mm (4.02")

High Pressure Varipak ................................................................................................ 10

Bellows Seal Varipak ................................................................................................... 11

Cryogenic Varipak ........................................................................................................ 12

Accessories and Options ........................................................................................... 13

Standard Actuator Options ...................................................................................... 14

Suffix2nd 2nd 3rd 4th 5th

Trim N°Max.

C

v

0 3.8

1 2.3

2 1.2

3 0.6

4 0.25

5 0.10

6 0.050

7 0.025

8 0.010

9 0.004

Adjustable

C

v

0 Undefined
1 Without
2 With

Construction

Option

Standard

A Angle

BS Bellows seal

EB Cryogenic

HP High pressure

MS Anti-cavitation

SP Special

2

Figure 2:
Actuator Mounting Positions

2 | GE Energy

3

4

1

Information contained in this publication is for general information only and
GE reserves the right to modify the contents without prior notice.
No warranty either expressed or implied is either given or intended.

Microflow Control Innovation

Optimized CV Characteristics

The VariPak valve outshines conventional microflow valves with its sup­port of a wide range of nominal Cv values (from 0.0016 to 3.8), using only
eight plugs and five seats.

Precise Cv Calibration and Selection - CV and F

Valve Sizes

Trim

.5"

(15mm)

• • • 9 0.0016 0.0020 0.0024 0.0028 0.0032 0.0036

• • • 8 0.004 0.005 0.006 0.007 0.008 0.009

• • • 7 0.010 0.013 0.016 0.019 0.021 0.023

• • • 6 0.020 0.025 0.030 0.035 0.040 0.045

• • • 5 0.04 0.05 0.06 0.07 0.08 0.09

• • • 4 0.10 0.13 0.16 0.19 0.21 0.23

• • • 3 0.25 0.30 0.35 0.40 0.45 0.50 0.55

• • • 2 0.5 0.6 0.7 0.8 0.9 1.0 1.1

• • • 1 1.9 1.1 1.3 1.5 1.7 1.9 2.1

(1) Flangeless, flanged or threaded connections.
(2) Flangeless or threaded connections.
(3) The “Risk-free” setting allows for easy valve capacity adjustments in the field to meet changing service conditions.

.75"

(20mm)

• • 0 1.5 1.9 2.3 2.6 2.9 3.2 3.5

1"

(25mm)

(2) (1)

No.

Min.

With Adjustable CV Function

Flow Coefficient C

Risk-

(3)

Free

V

L

Max.

0.0040 0.0040

0.010 0.010

0.025 0.025

0.050 0.050

0.10 0.10

0.25 0.25

0.60 0.60

1.2 1.2

2.3 2.3

3.8 3.8

Without

Adjustable

C

V

Function

Critical

Flow

Factor

F

L

0.85

0.85

0.85

0.85

0.85

0.90

0.90

0.92

0.92

0.92

Figure 3: Flow Coefficient Adjustment

28000 Series Varipak Control Valves | 3

General Data

Body

Type: globe style
angle style optional
Sizes: 1" (DN 25) standard
1/2" (DN 15) and 3/4" (DN 20) optional
Materials: Standard: type 316L St. St.
Optional: Monel®, Hastelloy® C,
Alloy 20, others
Options: Flanged valve
Anti-cavitation Varilog
High pressure
Bellows seal
Cryogenic
Angle valve
NACE version

Trim

Plug type: contoured, heavy top guided
multi-staged anti-cavitation (Varilog) optional
Seat type: metal seat
CV ratio: 500/1 at max. C

Flow characteristics: linear (trim No. 0 to 5)
modified linear (trim No. 6 to 9)
Flow Direction: flow-to-open
flow-to-close optional

Actuator

Type: spring-opposed rolling diaphragm
Action: direct or reverse, easily performed without
additional parts
CV adjustment: optional adjustable knob/lever
Handwheel: optional top mounted
Air connection: 1/8" NPT

Temperature Range/Seat Leakage

Valve Type Temperature Range Seat Class

200/1 at min. C

(1) (2)

V

V

Standard and High Pressure Valves

Cryogenic Valves

Varilog Anit-Cavitation Valves

(1) Please consult GE for applications outside the temperature ranges noted.
(2) Class IV seat leakage is standard and Class V is optional. Seat leakage class ratings per IEC 534-4 and ANSI/FCI 70-2.

-320°F to +650°F (-192°C to +343°C)

-455°F to +300°F (-270°C to +150°C)

-20°F to +650°F (-29°C to +343°C)

IV V

Rating/End Connections**

Valve Sizes

Maximum

C

inches mm Flangeless Threaded SW BW

V

ASME Class 150-1500

ISO PN 20-250

Flanged

Face-to-Face:

6.3” (160mm)

.5 15 2.3 • • • • •

.75 20 2.3 • • • • •

1 25 3.8 • • • • • •

** Please consult GE for applications requiring ASME Class 2500/ISO PN 420 rating.

ASME Class 150-600

ISO PN 20-100

Flanged

Face-to-Face:

4” (102mm)

4 | GE Energy

Materials of Construction

11

9

10

7

15

14

13

6

8

3

2

1

12

5

Figure 4: Sectional View

4

28000 Series Varipak Control Valves | 5