PRESSURE ISOLATION VALVE

Engineered for safe, economical isolation of pressure instruments and safety equipment during calibration and maintenance. Configurable as a single isolation valve or a Double Block & Bleed (DBB) Pressure Isolation Valve for positive isolation with a bleed between balls. End-connection choices include 2″ MNPT × 2″ FNPT or ASME Class 150–1500 integral flange × 2″ FNPT.

PRODUCT OVERVIEW

The Argus Pressure Isolation Valve simplifies pressure-system work by placing lockable, blowout-proof isolation right at the instrument take-off. Two 1/2″ FNPT accessory ports support gauges, vents, or transmitters without extra fittings. For critical work permits or sites demanding verifiable zero energy, choose the DBB model with two independent isolation balls and a 1/2″ FNPT drain/bleed port between them.

Why it helps your operation

Safer interventions: lockable handle(s), alert bleed location, and bidirectional shutoff at full operating pressure.
Fewer leak paths: one-piece body reduces joints and potential emissions.
Flexible installation: threaded or integral-flange options to match plant standards.
Sour service ready: trims to NACE MR0175 on request.

FEATURES

Safety is one of the most important advantages of the Argus Pig Valve. Unlike traditional pigging barrels, there are no risks associated with pressurized projectiles. Each valve is engineered with multiple features to ensure safe operation in all environments:

Key Features:

✓ Pressure Alert Port for audible/visual warning before opening 

✓ Non-impact entry cap & wrench – no hammering/sparking

✓ Entry-cap alignment arrows & high-visibility flow labels

✓ Vertical cap orientation reduces risk from horizontal pressurized openings

✓ Optional interlock to enforce safe operating sequence

SINGLE PRESSURE

The Argus Pig Valve’s compact footprint and versatile design let operators dramatically expand the number of pipelines they can maintain. Compared with conventional barrel-style launchers and receivers, the Argus Pig Valve is operationally more efficient, space-saving, and cost-effective.

✓ One-piece body construction for strength and leak reduction.

✓ Two-position lockable handle.

✓ Two 1/2″ FNPT accessory ports.

✓ Back-seated, blowout-proof stem.

✓ Bidirectional shutoff at full operating pressure.

DOUBLE BLOCK & BLEED PRESSURE

Argus Pig Valves are compatible with a wide range of inline inspection (ILI) tools used globally by hundreds of operators. This includes MFL, EMAT, and UT technologies from leading providers such as ROSEN, KMAX, and Quest. Argus works closely with ILI tool manufacturers to ensure seamless integration and reliable performance across inspection programs.

✓ Two independent balls with lockable handles.

✓ Two 1/2″ FNPT accessory ports plus 1/2″ FNPT drain between balls.

✓ Independent bidirectional shutoff of full operating pressure.

✓ Back-seated, blowout-proof stems with dual stem seals for trouble-free service.

STANDARD TRIM MATERIALS

Argus is a partner-centric company committed to delivering full-circle support with every product we provide. From initial design and implementation to ongoing maintenance and repair, Argus is with you every step of the way.

✓ Ball: ASTM A351-CF8M, ENC coated; Body: ASTM A350-LF2 (Class 1)

✓ Seat: Ertalyte® / Techtron® / PEEK; Stem: XM-19 (single) / AISI 4140 ENP (DBB)

✓ Seals: LTN & XNBR / Viton A; Bolting: A193-B8M (single) / 316 alloy steel (DBB)

✓ Alternate trims on request.

SPECS AT A GLANCE

Custom designs, trims, and materials are available upon request. Refer to the brochure for full specifications of standard products.

Parameter	Single Isolation	DBB Isolation
Max Operating Pressure	4,000 psi @ 100°F	5,000 psi @ 100°F
Temperature Ranges	–50°F to +250°F (Std); –20°F to +400°F (Med)	–50°F to +250°F (Std); –20°F to +400°F (Med)
End Connections	2″ MNPT × 2″ FNPT; ASME 150–1500 Integral Flange × 2″ FNPT	Same
Accessory Ports	Two 1/2″ FNPT	Two 1/2″ FNPT + 1/2″ FNPT drain (between balls)
Body/Trim	LF2 body, CF8M ball (ENC); XM-19 stem	LF2 body, CF8M ball (ENC); 4140 ENP stems
Compliance	ASME B16.34/B31.3, NACE MR0175 materials	Same

CLIENT TESTIMONIALS

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Reference Materials

Access our product brochures below

INLINE BALL CHECK VALVE

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Small Diameter Ball Valve

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