Authorized distributor · Venezuela

Qublock valves for extreme process conditions

Ball, butterfly, cryogenic and diverter valves engineered in Japan to operate from −196 °C to +800 °C and at pressures up to Class 2500. SISCOM delivers tailored solutions with engineering, supply and local technical service.

−196 °C → +800 °C

Temperature range

Class 150 – 2500

ASME / JIS 10K–63K pressure

½" – 90"

Size range

1 µm

Q-LAP® ball sphericity

About the brand

Japanese engineering with more than 40 years of experience in severe-service valves

Qublock Technology Co., Ltd. (Tokyo, Japan) designs and manufactures industrial valves for the most demanding applications: cryogenic service in LNG plants and carriers, handling of powders, slurries and catalysts, superheated steam and corrosive fluids. Its Q-LAP® lapping system achieves 1 µm ball sphericity, guaranteeing tight shut-off (zero leak) throughout the service life of the equipment.

As an authorized distributor in Venezuela, SISCOM supports your project from technical specification through commissioning: material selection (Titanium, Hastelloy, Inconel, Monel, Duplex, Zirconium), pneumatic, electric or hydraulic actuation, and after-sales support.

Product catalogue

Qublock valve families

Every series is built to order with the body, seat, connection and actuator configuration your process requires. Request the data sheet for any model.

Isolation and control

Ball valves

Trunnion, floating, V-Port, soft seated, double block and bleed, and high-cycle.

Metal-to-metal seating

Butterfly valves

High performance with double, triple and quadruple offset.

−196 °C

Cryogenic valves

For LNG, air separation, liquid oxygen and hydrogen-powered vessels.

Special applications

Diverter and tank bottom valves

Solutions for solids, catalysts and reactor discharge.

Technical summary

Operating range by family

Catalogue values. Out-of-range configurations available through custom engineering.

Family	Rating	Sizes	Temperature	Design standards
Trunnion ball / DBB	Class 150–2500 · JIS 10K–63K	1″–40″	up to 800 °C	API 608, API 6D, ASME B16.34, ISO 5211
Floating ball	Class 150–2500 · JIS 10K–63K	½”–10″	up to 800 °C	API 608, ASME B16.5/B16.10, MSS SP-72
V-Port ball	Class 150–1500	1″–24″	up to 800 °C	API 608, ISO 5752 · Class VI leakage
Soft-seated ball	Class 150–2500	½”–40″	−196 °C to 500 °C	API 608 · Zero leakage
PDS (high cycle)	Class 150–600	1″–24″+	up to 800 °C	API 608 · > 2,000,000 cycles
Quadruple offset butterfly	Class 150–2500 · JIS 10K–63K	2″–80″	−29 °C to +350 °C (std.)	API 609, ASME B16.34/B16.25, EN 558
High Performance butterfly QF	Class 150–2500	2″–80″	up to 550 °C	API 609, MSS SP-68 · Clase VI
Cryogenic ball	Class 150 / 300 / 600	½”–20″	−196 °C	BS 6364, API 608, ASME B16.34
Cryogenic butterfly	Class 150–900 · JIS 10K–63K	3″–60″	−196 °C	BS 6364, API 609, ASME B16.25
3-way diverter	Class 150–2500	1″–42″+	up to 500 °C+	API 608, ASME B16.34, ISO 5211
QT tank bottom	Class 150–1500	1″–16″	up to 550 °C	ASME B16.5/B16.34, ISO 15848

Available materials

Sectors

Applications and industries

More than a decade solving the most severe services in the process industry.

LNG: carriers and terminals

Cryogenic valves for loading, unloading and regasification of liquefied natural gas.

Chemical and petrochemical

Urea, ammonia, fertilizers, polysilicon, LDPE/HDPE, EO/EG and PDH.

Oil & Gas and refining

High-pressure isolation, DBB and high-temperature service in refineries.

Offshore and marine

Corrosion-resistant materials for platforms and FPSOs.

Air separation

Liquid oxygen, nitrogen and argon at −196 °C with fire-safe design.

Hydrogen

Supplied for HANARIA, Japan's first hydrogen-powered passenger vessel.

Powders, slurries and catalysts

Pocketless 3-way diverter valves for handling abrasive solids.

Reactors and tanks

Tank bottom valves with ISO 15848 fugitive emissions compliance.

Compliance

Standards and certifications

Design, testing and manufacture to the international codes your project requires.

Services

Custom solutions and repair

Tailor Made Solutions

Valve engineering tailored to your process: exotic materials, special geometries, jacketing, multiple ports and integrated actuation.

Valve Repair & Upgrade

Repair, Q-LAP® relapping, seat replacement and upgrading of existing valves (Qublock or third-party) to extend their service life.

Quotation

Request your quote or data sheet

Tell us your process conditions and a SISCOM application engineer will propose the right Qublock configuration, with lead times and local support.