Ball Valves

LPA12/15 Floating Soft Seat Ball Valve Threaded / Welded Connection

LPA12 Threaded / LPA15 Welded Floating Soft-Seated Ball Valve with reduced bore, pressure-assisted soft-seat sealing, blowout-proof stem, anti-static device, and low-torque quarter-turn operation, delivering bubble-tight shutoff and compact, leak-free isolation for general industrial piping.

Product Description

This threaded floating soft-seated ball valve provides reliable on/off isolation for liquids, gases, and light media in compact piping systems. The floating ball shifts axially under line pressure, pressing against the downstream resilient seat ring to form a self-energizing seal that tightens with increasing differential pressure, ensuring bubble-tight shutoff per API 598 / EN 12266-1 Rate A.

Soft seats are available in PTFE, reinforced PTFE, PEEK, Nylon, and POM, covering temperatures from −29 °C to +260 °C.

Body construction is one-piece, two-piece, or three-piece in carbon steel (WCB) or stainless steel (CF8 / CF8M). End connections include threaded (NPT / BSPT / BSP per ASME B1.20.1, ISO 7/1, ISO 228) and welded (socket weld per ASME B16.11, butt weld per ASME B16.25, or orbital weld) configurations. Sizes range from DN 8 (¼″) to DN 100 (4″), with reduced-bore design as standard for compact installation and cost efficiency.

The stem is blowout-proof and sealed with PTFE packing and an O-ring secondary seal. An anti-static device maintains ball-to-body electrical continuity. An ISO 5211 top pad accepts direct-coupled actuators or manual levers. Every valve is tested: shell test at 1.5 × PN and seat test at 1.1 × PN.

Key Features

Pressure-assisted soft-seat sealing – Floating ball self-energizes against the downstream seat under line pressure, achieving zero-leakage shutoff without excessive torque.
Reduced-bore design – Compact port diameter ensures smaller body size, lighter weight, and lower cost, suitable for applications where full-flow capacity is not critical.
Threaded & welded end connections – NPT / BSPT / BSP threaded ends for quick tool-light installation; socket weld (ASME B16.11), butt weld (ASME B16.25), or orbital weld ends for permanent, vibration-resistant, leak-free joints in high-integrity piping.
Low operating torque – Lapped ball surface and low-friction seat materials reduce torque, enabling easy manual operation or small actuators.
Blowout-proof stem – Internally retained stem per API 6D prevents ejection under line pressure.
Anti-static device – Spring-loaded plungers maintain ball-stem-body continuity, preventing spark ignition in flammable media.
Wide seat material range – PTFE, RPTFE, PEEK, Nylon, POM cover chemical, water, gas, and mild temperature services.
Three-piece body option – Allows in-line seat and ball replacement without breaking pipe connections.
ISO 5211 actuator mounting – Standardized top pad accepts pneumatic or electric quarter-turn operators.
100 % factory tested – Hydrostatic shell and seat tests per API 598; material certificates available.

Typical Applications

Compressed air, water, oil, and gas utility lines
Instrumentation and sampling systems
Chemical dosing and general process piping
Hydraulic and thermal-oil circuits
Food, beverage, and light industrial services
Steam lines in papar plant

Specifications

Valve Size:
NPS1/4 - NPS4;
DN10 - DN100
Pressure Class:
1000 PSI, 2000 PSI;
Operating Temperature:
-29 to +260 °C / -20 to +500 °F
Process Connection Type:
Threaded includes PT, NPT, BSPP, BSPT, Butt Welded, Socket Welded, etc
Valve Bonnet:
Standard
Stem Seal:
Adjustable Packing
Seat Leakage:
Class VI (FCI-70.2) Standard Leakage Rates, soft seating Class VI-Bubble tight (Zero Leakage)
Flow Characteristics:
Quick Open
Critical Service:
General Service, Chemical, Pharmaceutical, Steam, Chlorine, Oxygen, Vacuum
Valve Actuator:
Electric, Hydraulic, Pneumatic, Lever, Gear, Electro-Hydraulic
Valve Accessories:
Pneumatic Positioner, Electro Pneumatic Positioner, Limit Switch, SOV, Air lock relay, Volume Booster, AFR, Position Transmitter
Certifications:
PED, ATEX, SIL capable, Fugitive Emission
Media:
Specialty Gases, Liquids, Air, Inert Gas, Water
Other Configurations:
Contact your local Lapar business partner or sales office to learn about additional specifications or options for this product.