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Valves for Pulp & Paper Industry — Numaligarh

Numaligarh Refinery Limited (NRL) — co-owned by Bharat Petroleum, Oil India Limited, and the Government of Assam — operates a 3 Mtpa refinery currently undergoing a major expansion to 9 Mtpa with integrated petrochemical units including a wax and bio-bitumen plant; NRL's greenfield expansion projects require API 6D ball valves, API 600 gate and globe valves, and check valves across all ISBL and OSBL units; Vajra Industrial Solutions supplies IBR-certified steam valves, API 6D Class 300–600 valves, and full API 598 test-certified valves for NRL expansion procurement, with delivery to Assam via road and rail from Vadodara within 7–10 business days.

Knife gate valves, diaphragm valves, ball valves (CS/SS), and pinch valves for kraft pulping, black liquor handling, bleaching chemical circuits, and paper machine wet-end service.

ISO 9001:2015ASME B16.34TAPPI TIS 0304-08 (Pulp consistency)IBR (Steam service in recovery boiler)PED 2014/68/EU (European pressure equipment)
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Pulp & Paper Industry Valves — Available in Numaligarh

Knife Gate Valve (Pulp Stock)

PN 6 / PN 10 / PN 16

Standard on/off isolation valve for pulp stock lines — blade cuts through fibres; rubber-lined for abrasion resistance

Materials: DI or CS body, SS 316 or hardened SS 420 blade, natural rubber or EPDM seat liner  ·  Standards: ISO 9001, EN 13397, TAPPI TIS 0304-08
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Diaphragm Valve (Chemical / Bleach Plant)

PN 10 / PN 16

Zero leakage for bleaching chemicals (ClO₂, H₂O₂, NaOH) — no packing in contact with aggressive bleaching agents

Materials: SS 316L or PVDF body, PTFE diaphragm for ClO₂ and H₂O₂, EPDM for NaOH  ·  Standards: ASME B16.34, ISO 16138, ISO 9001
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Ball Valve (CS / SS, Black Liquor Service)

Class 150 / 300 / 600

Isolation and on/off control on black liquor lines (strongly alkaline, high-temperature, high-solids) — trunnion design for larger sizes

Materials: A216 WCB (lower temperature), SS 316 / CF8M (high-temperature and corrosive service), hardened SS 316 trim  ·  Standards: ASME B16.34, API 6D (where applicable), ISO 9001
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Pinch Valve (White Water / Consistency Control)

PN 6 / PN 10

Pulp consistency and white water flow control — no internal obstruction, self-cleaning, ideal for fibrous suspensions

Materials: CS or DI body, natural rubber sleeve (standard) or EPDM (elevated temperature)  ·  Standards: ISO 9001, EN 13397
View Pinch Valve (White Water / Consistency Control) options for Numaligarh →

Pulp & Paper Industry Industry in Numaligarh

Numaligarh Refinery Limited (NRL) — co-owned by Bharat Petroleum, Oil India Limited, and the Government of Assam — operates a 3 Mtpa refinery currently undergoing a major expansion to 9 Mtpa with integrated petrochemical units including a wax and bio-bitumen plant; NRL's greenfield expansion projects require API 6D ball valves, API 600 gate and globe valves, and check valves across all ISBL and OSBL units; Vajra Industrial Solutions supplies IBR-certified steam valves, API 6D Class 300–600 valves, and full API 598 test-certified valves for NRL expansion procurement, with delivery to Assam via road and rail from Vadodara within 7–10 business days.

Oil RefiningPetrochemicalNatural Gas PipelineCrude Oil Exploration

Critical Valve Requirements

Abrasion resistance for pulp fibres — natural rubber or EPDM liners with hardness 60–70 Shore A for knife gate seats
Full-bore, self-draining design for pulp stock — prevents fibre plug formation when valve is closed
Chemical resistance to bleaching agents: ClO₂, H₂O₂, NaOH, SO₂ — PTFE or PVDF diaphragms for oxidising bleach chemicals
High-temperature capability for black liquor (up to 150°C) — SS 316 or alloy steel body; A217 WC6 for recovery boiler steam
IBR certification for valves on recovery boiler steam lines (high-pressure steam service)
Replaceable wear components (sleeves, liners, diaphragms) — essential for minimising mill downtime
Bi-directional sealing for knife gate valves on pulp stock lines where reverse differential is possible

Why Numaligarh's Oil Refining Sector Needs Pulp & Paper Industry Valves

Numaligarh Refinery Limited (NRL) — co-owned by Bharat Petroleum, Oil India Limited, and the Government of Assam — operates a 3 Mtpa refinery currently undergoing a major expansion to 9 Mtpa with integrated petrochemical units including a wax and bio-bitumen plant; NRL's greenfield expansion projects require API 6D ball valves, API 600 gate and globe valves, and check valves across all ISBL and OSBL units; Vajra Industrial Solutions supplies IBR-certified steam valves, API 6D Class 300–600 valves, and full API 598 test-certified valves for NRL expansion procurement, with delivery to Assam via road and rail from Vadodara within 7–10 business days. Key facilities in the Numaligarh area — including Numaligarh Refinery Limited (NRL) — 3 Mtpa expanding to 9 Mtpa, OIL (Oil India Limited) Duliajan fields, IGGL Indradhanush Gas Grid (northeast India) — rely on Knife Gate Valve (Pulp Stock) for their oil refining operations. Vajra Industrial Solutions supplies Knife Gate Valve (Pulp Stock), Diaphragm Valve (Chemical / Bleach Plant), Ball Valve (CS / SS, Black Liquor Service), Pinch Valve (White Water / Consistency Control) for pulp & paper industry projects across Assam, with full ISO 9001:2015 and ASME B16.34 compliance documentation — EN 10204 3.1 material test certificates, API 598 pressure test reports, and third-party inspection co-ordination available for every order.

Delivery to Numaligarh

Vajra Industrial Solutions offers delivery to Numaligarh in 3–7 business days. Emergency dispatch available for plant shutdowns and critical site requirements.

Also serving: Numaligarh Refinery Limited (NRL) — 3 Mtpa expanding to 9 Mtpa, OIL (Oil India Limited) Duliajan fields, IGGL Indradhanush Gas Grid (northeast India), Paradip–Numaligarh pipeline (HPCL-Assam Accord), BPCL–BRPL Guwahati Refinery supply chain

FAQ — Pulp & Paper Industry Valves in Numaligarh

Do you supply pulp & paper industry valves in Numaligarh?
Yes. Vajra Industrial Solutions supplies Knife Gate Valve (Pulp Stock), Diaphragm Valve (Chemical / Bleach Plant), Ball Valve (CS / SS, Black Liquor Service), Pinch Valve (White Water / Consistency Control) for pulp & paper industry applications in Numaligarh, Assam. Numaligarh Refinery Limited (NRL) — co-owned by Bharat Petroleum, Oil India Limited, and the Government of Assam — operates a 3 Mtpa refinery currently undergoing a major expansion to 9 Mtpa with integrated petrochemical units including a wax and bio-bitumen plant; NRL's greenfield expansion projects require API 6D ball valves, API 600 gate and globe valves, and check valves across all ISBL and OSBL units; Vajra Industrial Solutions supplies IBR-certified steam valves, API 6D Class 300–600 valves, and full API 598 test-certified valves for NRL expansion procurement, with delivery to Assam via road and rail from Vadodara within 7–10 business days. We offer delivery to Numaligarh in 3–7 business days with full documentation and third-party inspection.
What certifications are required for pulp & paper industry valves in Numaligarh?
For pulp & paper industry in Numaligarh, the applicable standards are: ISO 9001:2015, ASME B16.34, TAPPI TIS 0304-08 (Pulp consistency), IBR (Steam service in recovery boiler), PED 2014/68/EU (European pressure equipment). All valves are supplied with full documentation including material test reports (EN 10204 3.1/3.2), pressure test certificates, and dimensional inspection reports. Third-party inspection (TPI) by EIL, Bureau Veritas, Lloyd's Register, or the client's nominated inspector can be arranged.
What is the delivery time for pulp & paper industry valves to Numaligarh?
Standard stock sizes: delivery to Numaligarh in 3–7 business days. Custom sizes and special materials (Duplex, Hastelloy, P91): 4–8 weeks manufacturing lead time. Express dispatch available for urgent site requirements. Contact us at +91-9979774557 or sales@vajravyuh.com with your specification and required delivery date.
What valve is best for pulp stock (fibrous suspension) service?
For pulp stock (cellulosic fibre suspension at 3–14% consistency), knife gate valves are the most common choice. The blade-gate design allows the blade to cut through the fibre mat and seat against a rubber seat liner, providing reliable on/off isolation. Full-bore design prevents fibre plug formation in the valve body. Pinch valves are also widely used for lower-pressure stock lines (PN 6/10) and offer excellent resistance to fibre abrasion (no internal metal in the flow path). Globe and ball valves are not suitable for medium-to-high consistency stock without special design modifications.
What materials resist black liquor in kraft pulp mill valves?
Black liquor is a challenging fluid: strongly alkaline (pH 12–14), high dissolved solids (50–70% dry solids in strong black liquor), contains sodium carbonate, sodium sulphate, sodium sulphide, and lignin, at temperatures of 90–150°C. Carbon steel is susceptible to corrosion in hot black liquor. SS 316 (A351 CF8M) is the standard material for black liquor valve bodies and trim. For high-temperature, high-solids strong black liquor near the evaporators and recovery boiler: Duplex stainless (F51) or Alloy 20 provides better corrosion resistance. White liquor (NaOH + Na₂S, pH 13–14): SS 316L minimum; Duplex preferred.

Other Application Guides for Numaligarh

Oil & Gas PipelinesPharmaceutical & Biotech (Cleanroom / Hygienic)LNG & Cryogenic ServiceWater Treatment & DesalinationRefinery & Petrochemical ProcessPower Generation (Thermal, Gas, Hydro)Marine & Offshore ServiceMining & Mineral ProcessingHVAC & Building ServicesChemical & Petrochemical ProcessingHygienic Food & Beverage ProcessingHydrogen & Clean Energy ServiceDesalination & High-Purity Water

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Pulp & Paper Industry Valves — Numaligarh

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Standards

ISO 9001:2015
ASME B16.34
TAPPI TIS 0304-08 (Pulp consistency)
IBR (Steam service in recovery boiler)
PED 2014/68/EU (European pressure equipment)

Product Categories

Ball Valves Gate Valves Diaphragm Valves Pinch Valves

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