Subsea Nozzle Check Valve

A full bore check valve with high Cv and high-speed response time


  • Compact design
  • High Cv
  • Fast response time
Subsea Nozzle Check Valve

ATV provides a full range of Nozzle Check valves for production, processing and transmission applications, suitable for pressure up to 2500 psi and water depths up to 10000 ft (3000 m). 

Nozzle Check valves have typically a full bore design with optimized design of body cavity and disk to grant a streamlined flow with almost constant section all through the inside passage thereby granting a low pressure drop and a high-speed response time. Design is carried out using advanced parametric design tools and solid modelling programs. Valves design undergoes sophisticated structural and fluid dynamic analysis, carried out with FEA and CFA analysis: inner profiles are optimized in order to control the turbulence level and to increase device performances. Due to its internal design, the nozzle check valve is not suitable for installation in lines where the piggability is a requirement. Furthermore, since the body is monobloc, there are fewer potential leak paths than the other types of check valves. 

Materials are sourced from qualified suppliers on the base of specifications that reflect the industry standards (ASTM, NORSOK, BS, DIN or others), but do also incorporate additional requisitions resulting from long experience.

ATV designs, manufactures and tests its products in accordance with all the relevant Industry standards and codes (API, ANSI, ASME, DNV, BS, ISO, NACE, PED and others). 

ATV stresses its willingness to produce engineered valves; therefore, it welcomes requests for special size, class and design requirements. 


Subsea Nozzle Check Valve - Specifications


APPLICATIONS Subsea pipeline, chemical injection system
STANDARD API 6D, API 6DSS,ASME VIII Division 1 and 2, ASME B16.34, ASME B16.10, ASME B16.5, NACE MR0175 and other diffused Industry standards
RANGE 2” ÷ 60” Class ANSI 600, 2” ÷ 48” Class ANSI 900, 2” ÷ 36” Class ANSI 1500, 2” ÷ 20” Class ANSI 2500. Larger sizes available on request.
WATER DEPTH Up to 3000 m (10000 ft). Greater depth upon application.


One-Piece cast body construction
Full bore
Welded-in or removable seat
Metal seated
Wear resisting hardfacing on sealing surfaces


Flanges (to ASME B16.5 up to 24” and B16.47A for 26” and larger)
Compact flanges (to Norsok L005)
Buttwelded ends
Hub ends for clamped connections (as per customer requirement)
Studded end flanges


Carbon steel
Low alloy steel
Stainless steel
Duplex and superduplex stainless steel
Nickel Alloy


Soft seated for tight sealing

Advanced Technology Valve S.p.A.

Headquarters and manufacturing plant:
Via Ombriano 2
I-23823 Colico (LC), Italy
Tel. +39 0341 932111
Fax +39 0341 930785

Our Mission

We provide flow control solutions (valve and actuators) with the highest standards of reliability and performance to the most critical applications of the Oil & Gas upstream and downstream industry, Oil & Gas transmission, Power industry.