Your browser is out of date.

You are currently using Internet Explorer 7/8/9, which is not supported by our site. For the best experience, please use one of the latest browsers.

Pressure Seal Valves


Bonney Forge manufactures forged pressure seal valves in pressure seal gate valve, pressure seal globe valve, and swing check designs that are designed in accordance to ASME B16.34 and, where applicable, API 600 pressure seal valve or ISO 10434. All designs are forged for improved mechanical properties, pressure retention, and quality.

The Forged Pressure Seal Valves utilize a pressure seal bonnet designed to improve bonnet sealing performance as pressure increases. The valves are an excellent choice for high-temperature and pressure applications such as steam applications because the higher the pressure, the better the sealing characteristics.

Contact Us
Pressure Seal Valves

Pressure Seal Valves

Product standards & features

Applicable standard range

SIZE 1/2 NPS - 24 NPS
CLASS 600 - 2500

Applicable standards

Design ASME B16.34, MSS SP-144
Inspection & testing API 598
Marking MSS SP-25
Fugitive emission ISO 15848

Applicable end finishes

Face to face ASME B16.10
Socket weld ASME B16.11
Screwed ends (NPT) ASME B1.20.1
Flanged ends ASME B16.5
Butt welding ends ASME B16.25

Product features

1 No pressure retaining body-bonnet flanges or bolting.
2 Forged structure for all pressure containing parts. Optimized design for thermal fatigue required for power plant where frequent start-ups & shut-downs are the must.
3 Flanged valves are provided with flanges integral to the valve body forging or full penetration welded.
4 Lighter weight design compared to bolted bonnet.
5 High quality packing for reliable tightness and low emission performance.
6 Sealing surfaces are machined to the tightest tolerances and lowest roughness and to ensure reliable sealing & long service life.
7 Best-in-Class CV values.
8 Outside Screw and Yoke (OS&Y).
9 Low operation torque design.
10 Self aligning two piece packing gland.
11 Graphite based Pressure seal gasket with metal anti-extrusion caps.