National Oilwell Varco 719375 EMER Part Kit

National Oilwell Varco 719375 EMER Part Kit 3-10M T-B VLV INT H2S LT

The NOV 719375 is an internal trim and seal emergency overhaul kit designed specifically for 3-1/16″ bore, 10,000 PSI rated working pressure Top-Bottom (T-B) gate valves. Deployed primarily on offshore drilling rigs, drillships, and semi-submersible blowout preventer (BOP) stacks, this kit supplies the primary metallic pressure-retaining internals required to restore bidirectional metal-to-metal sealing integrity during unplanned offshore interventions or scheduled dry-dock recertifications.

The 719375 EMER Part Kit includes the core mechanical trim—specifically the gate, seat assembly, stem, and gate bushing—engineered to meet API 6A PSL-3 (Product Specification Level 3) traceability and NACE MR0175 / ISO 15156 sour gas H2S and low-temperature (LT) metallurgical requirements. Because this is a purely mechanical pressure-control assembly, electrical input/output ratings and terminal allocations do not apply.

Model Details:

• Manufacturer Part Number (MPN): 719375
• OEM Description: EMER PART KIT, 3-10M T-B VLV INT, H2S, LT
• Valve Series: 3-10M (3-1/16″ Nominal Bore, 10,000 PSI Working Pressure) Top-Bottom (T-B) Gate Valve
• Service Class: Sour Service H2S & Low Temperature (LT), Material Class DD / EE

Features

1. Complete Mechanical Trim Replacement: Bundles the matched internal gate, seat assembly, operating stem, and gate bushing into a single factory-verified kit to eliminate dimensional stack-up mismatches during emergency valve rebuilds.
2. API 6A PSL-3 Compliance: Major pressure-controlling sub-components conform to API Specification 6A Product Specification Level 3, ensuring full heat-lot traceability and non-destructive examination (NDE) standards.
3. 10,000 PSI Bidirectional Sealing: Precision-lapped gate and seat interfaces restore bubble-tight shutoff across 3-10M high-pressure choke, kill, and manifold lines.
4. Direct OEM Drop-In Fitment: Engineered to exact NOV/Shaffer tolerances for 3-10M Top-Bottom (T-B) valve bodies without requiring field machining or bore modifications.

Technical Specifications

Equipment Compatibility

• NOV / Shaffer 3-10M Top-Bottom (T-B) Gate Valves: Direct internal trim compatibility across manual handwheel and hydraulic-actuated 3-1/16″ 10,000 PSI T-B valves.
• BOP Choke & Kill Manifolds: Compatible with NOV/Shaffer subsea and surface BOP stack choke and kill wing valves utilizing the 3-10M T-B body architecture.

Frequently Asked Questions

What is included in the National Oilwell Varco 719375 EMER Part Kit?

The NOV 719375 emergency part kit contains the core internal mechanical trim for a 3-10M Top-Bottom gate valve: the gate (P/N 718729), seat assembly (P/N 718291), stem (P/N 20015425), and gate bushing (P/N 717378).

What does “3-10M T-B VLV INT H2S LT” stand for?

It designates a 3-1/16 inch nominal bore valve rated for 10,000 PSI (3-10M) working pressure, built in a Top-Bottom (T-B) gate valve configuration, containing internal (INT) trim rated for sour gas H2S and low-temperature (LT) service.

Is the NOV 719375 kit rated for API 6A PSL-3 service?

Yes. The primary pressure-controlling components inside the kit—including the 20015425 stem and 718729 gate—are manufactured to API Spec 6A PSL-3 standards for sour gas and low-temperature well-control applications.

How does NOV 719375 differ from NOV 719376?

NOV 719375 is the metallic emergency internal trim kit (gate, seats, stem, and bushing), whereas NOV 719376 is the 2-year elastomeric service spare part kit (seals, O-rings, and packing). Both are frequently used together during a major valve overhaul.

Can the NOV 719375 kit be used in a 4-10M or 3-5M valve?

No. While the 717378 gate bushing shares cross-compatibility with 4-5M and 4-10M valves, the 718729 gate, 718291 seat assembly, and 20015425 stem are sized specifically for 3-1/16″ 10,000 PSI (3-10M) Top-Bottom gate valves.