ENTECH Nozzle Check Valves Brochure Valve
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ENTECH
Nozzle check valves
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Content
Introduction � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � 4
Features and applications � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � 5
Design and product offerings: DRV-Z � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � 6
Design and product offerings: DRV-BN � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � 7
Quality assurance � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � 8
Dimensional data and weights � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � 8
Flow performance data � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � 8
Materials of construction � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � 9
Design temperatures � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � 9
Installation guidelines � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � 10
Cameron services for valves and actuation � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � 11
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ENTECH Nozzle Check Valves
Cameron is a leading provider of valves
and measurement systems to the oil and
gas industry. Our products are primarily
used to control, direct, and measure the
flow of oil and gas as it is moved from
individual wellheads through flowlines,
gathering lines, and transmission systems
to refineries, petrochemical plants, and
industrial centers for processing.
Cameron provides a wide range of valves for use in natural gas, liquefied
natural gas (LNG), crude oil, and refined products transmission lines� The
traditional CAMERON T30 Series* fully welded ball valve product line has
been combined with the GROVE* valves, RING-O* subsea valves, TOM
WHEATLEY* check valves, ENTECH* nozzle check valves, and TK* trunnion-
mounted ball valve product lines� This broad offering has strengthened our
ability to serve as a single source for customer requirements� Cameron also
provides critical service valves for refinery, chemical, and petrochemical
processing businesses and for associated storage terminal applications,
particularly through the ORBIT* rising stem ball valve and GENERAL* valve
lines� These brands are complemented by WKM* valves, TBV* valves, and
TEXSTEAM* plug valve products and considerably expand the scope of our
product offerings�
ENTECH* nozzle check valves are recognized for their use in pipelines,
production, and process applications� The valves are applied primarily
in gas compression applications� Nonslam valves prevent reverse flow,
and their short stroke length reduces closing time and eliminates water
hammer� The pressure loss with a nozzle check valve is minimal and has
one of the highest fluid dynamic performances�
Voghera, Italy
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Since 1935, ENTECH nozzle check valves have provided reliable backflow
prevention for the oil, gas, water, and process industries� Beginning in
1972, they also served the nuclear industry with nozzle check valves for
containment and commercial process�
The ENTECH valve is designed to meet the criteria of conventional check
valves by allowing forward flow under normal conditions, opening easily,
firmly backseating at low velocity, and closing on reverse flow with minimal
seat leakage�
Easy stroking
Very low flow is required to fully open, delivering highest fluid
dynamic performance�
Innovative nozzle design
Streamlining the flow results in very low pressure drops and operating
costs with no turbulence and vibrations�
Tight shutoff
Metal-to-metal conical seating facilitates perfect self-alignment and
minimizes maintenance costs�
Extreme reliablility
The SLS* spring-loaded lip seal disc responds quickly to flow variations�
Rapid closing
The valves help to prevent backflow to protect the pipe and
critical equipment�
High customizability
The valve is designed to fit almost any application, with internals that
can be replaced to suit future flow conditions, and aligned with other
Cameron products�
Applications
■ Compressor discharge
■ Natural gas refineries
■ Pump discharge
■ Critical equipment discharge
■ Compressor and pump bypass
■ Storage facilities
■ Offshore operations
■ Nuclear power plants
A very low flow velocity is needed to fully open the valve, and the stroke and closure
time are short.
The valves’ axial design helps to deliver streamlined flow, low pressure drops, and
high-dynamic performances.
With modular internal components, the valves can be customized to customer needs.
Features and Applications
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Design and Product Offerings: DRV-Z
The DRV-Z nozzle check valve is a small-bore valve designed for
use in
piping systems from 1 to 14 in [25 to 350 mm] in
diameter� This size range
allows the use of a simple, streamlined, in-line check design that is quick
to respond to changes in velocity�
The DRV-Z Design also provides
■ nonslam closure
■ metal seating
■ fast closing
■ mounting in any orientation
■ low pressure drop
■ no scheduled maintenance
■ tight shutoff�
Sizes and ratings
■ Size: 1 to 14 in [25 to 350 mm]
■ ANSI/ASME Classes 150–2500
■ API 2000–10000
■ Face-to-face manufacturers standard
■ ANSI/ASME weld-end flanges (other flange-end configurations
upon request)
■ Other sizes and pressure classes considered upon request
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Design and Product Offerings: DRV-BN
The DRV-BN nozzle check valve is a large-bore valve designed for compressor
and pumping stations from 16 in [400 mm] in diameter and larger�
In this size range, the ENTECH valve line incorporates
■ annular ring design that reduces the weight of the disc to avoid any
fatigue phenomena and significantly improve valve response time
to pipeline flow changes
■ centralized single-coil spring mechanism as the most consistent spring-
force design, which is stable and responds rapidly to flow variation
■ flowspacer that allows the valve to be fully customizable to specific
service and installation conditions and easily reconfigurable in case of
potential changes of customer plant flow performances over the years�
The DRV-BN design also provides
■ nonslam closure
■ metal seating
■ fast closing
■ spring-loaded disc that allows mounting in any orientation
■ low pressure drop
■ no scheduled maintenance
■ tight shutoff�
Sizes and ratings
■ Size: 16 in [400 mm] and larger
■ ANSI/ASME Classes 150–2500
■ Face-to-face manufacturers standard
■ ANSI/ASME weld-end flanges (other flange-end configurations
upon request)
■ Other sizes and pressure classes considered upon request
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Quality Assurance
Cameron operates a high-level QC program to ensure all its products are
designed and manufactured to the highest standards using the latest
technology� The quality assurance program encompasses our entire
operation, from order entry to final inspection and delivery�
Our Lean Six Sigma manufacturing philosophy and the standard
warranty, which covers the product for 12 months after installation or
18months after shipment, whichever occurs first, assures that the design,
materials, and workmanship of all ENTECH valves result in years of
dependable operation�
Specifications and compliance
ISO 9001:2008, API 6D/ISO 14313, ISO 19001, API 6DSS/ISO 14723,
API 6A/ISO 10423, PED, GOST, and CRN�
Dimensional Data and Weights
DRV-Z flanged-end valves
Valve Size 150 300 600 900
NB DN Length, mm Weight, kg Length, mm Weight, kg Length, mm Weight, kg Length, mm Weight, kg
1 25 100 5 100 5 100 8 100 12
2 50 120 9 120 9 120 11 200 16
3 80 180 16 180 23 180 30 180 32
4 100 240 25 240 38 240 46 240 60
6 150 350 49 350 70 350 97 350 165
8 200 450 88 450 121 450 163 450 241
10 250 500 130 500 177 500 269 500 310
12 300 600 –†600 –†600 –†600 –†
14 350 700 –†700 –†700 –†700 –†
DRV-BN flanged-end valves
16 400 500 385 500 385 500 550 500 640
20 500 625 665 625 665 625 905 665 1,210
24 600 745 1,060 745 1,060 745 1,450 800 2,165
30 750 930 2,040 930 2,040 930 2,640 1,060 3,855
36 900 1,190 3,285 1,190 3,285 1,190 4,340 1,270 6,430
42 1,050 1,308 –†1,308 –†1,308 –†–†–†
48 1,200 1,485 –†1,485 –†1,485 –†–†–†
† Information provided upon request.
DRV-Z Flow Performance Data
Size, in CV, galUS/min
150 300 600 900
1 20 20 20 20
2 84 84 84 84
3 227 227 227 227
4 366 366 366 366
6 881 881 881 881
8 1,692 1,692 1,692 1,692
10 2,762 2,762 2,762 2,762
12 3,043 3,043 3,043 3,043
14 6,003 6,003 6,003 5,952
DRV-BN Flow Performance Data
Size, in CV, galUS/min
150 300 600 900
16 8,100 8,100 8,100 8,100
20 12,500 12,500 12,500 12,500
24 17,984 17,984 17,984 17,984
30 30,900 30,900 30,900 30,900
36 43,000 43,000 43,000 43,000
42 46,000 46,000 46,000 46,000
48 58,000 58,000 58,000 58,000
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Materials of Construction
Part Description Low-Temp. Carbon Steel/316SS Seats Low-Temp. Carbon Steel/Inc625 Seats Full Stainless Steel Full Duplex
1 Body A352 LCC/A350 LF2 A352 LCC/A350 LF2 A351 CF8M /A182 F316 S31803/A182 F51
2 Nozzle A352 LCC A352 LCC A351 CF8M S31803
3 Seat 316SS Inconel® 625 Integral Integral
4 Disc A351 CF8M A351 CF8M A351 CF8M S31803
5 Diffuser A352 LCC A352 LCC A351 CF8M S31803
6 Spring X-750 X-750 X-750 X-750
Design temperatures
Low-temperature carbon steel: −50 to 572 degF [−45 to 300 degC]
Stainless steel: −320 to 572 degF [−196 to 300 degC]
Duplex: −320 to 572 degF [−196 to 300 degC]
All materials comply with NACE MR0175/ISO 15156 sour service requirements�
Others materials are available upon request to meet specific service requirements�
Applications with temperatures below −50 degF [−45 degC] or exceeding 350 degF [176 degC]
are subject to engineering approval�
5
25
3
3
6
6
1
1
2
4
4
DRV-BN.
DRV-Z.
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Installation Guidelines
The nozzle check valve should be installed a
minimum of five diameters, and preferably eight
diameters, downstream of a flow impediment
(valve, reducer, bend, etc�) to ensure a good flow
pattern at the entry to the nozzle check valve�
The nozzle check valve also should be installed
at least three diameters upstream of a bend or
reducer to avoid choked flow conditions, which
can prevent the full opening of the check valve�
All valve inquiries will require valve datasheets that provide minimum, normal, and
maximum operating conditions. Valves must be sized to fully open at minimum
operating conditions. The minimum operating conditions refer to what the lowest
consistent flow rate will be for an extended period of time. Startup conditions should
not be considered as minimum operating conditions.
The nozzle check valve can be installed on the
upstream side of isolating valves� If the isolating
valve is throttling, clearance as shown should be
allowed to ensure full pressure recovery after the
nozzle check valve�
The nozzle check valve can be installed closer to
the inlet of the isolating valve if it is full port and
fully open�
At least 5 and preferably 8 nominal
pipe diameters
At least 3 nominal
pipe diameters
At least 3 nominal pipe
diameters after valve
to bend
≥ 3∅
≥ 3∅5–8∅
≥ 2∅
At least 2 nominal
pipe diameters from
valve to valve
If isolating valve is throttling,
check valves should be installed
as shown�
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Aftermarket Services for Valves and Actuation
We build it� We back it�
Cameron is well positioned to quickly and efficiently deliver total
aftermarket support with unmatched OEM expertise� Our highly skilled
engineers and technicians are available around the clock to respond to
customer queries, troubleshoot problems, and offer reliable solutions�
Easily accessible parts and spare valves
■ OEM spare valves, actuators, and parts (including non-Cameron brands)
■ Handling, storage, packaging, and delivery
■ Dedicated stocking program
Comprehensive aftermarket services portfolio
■ Parts and spare valves
■ Repair
■ Field services
■ Preventative maintenance
■ Equipment testing and diagnostics
■ Remanufacturing
■ Asset preservation
■ Customer property management
■ Training and recertification services
■ Warranty
Customized total valve care programs
■ Engineering consultancy
■ Site management
■ Flange management
■ Startup and commissioning
■ Spare parts and asset management
■ Operational support
