Question 1

What is the working pressure rating?

Accepted Answer

6,000 psi working pressure, 5K class. The choke body is rated at the full pressure class; the trim (stem, bean, seat) is sized to handle the rated ΔP at the bean orifice. Note: pressure drops across a choke can be severe — specify both upstream and downstream pressures on the RFQ to confirm trim suitability.

Question 2

What is the difference between Adjustable and Positive chokes?

Accepted Answer

Adjustable chokes use a handwheel-controlled threaded stem to vary the orifice opening — the operator can dial in any flow rate from fully closed to fully open. Position indicator on the bonnet shows current opening. Positive chokes have a fixed orifice (bean) of a calibrated size — the bean is interchangeable to change settings, but cannot be varied during operation. Adjustable for active flow control; positive for stable, repeatable flow allocation.

Question 3

What does the trim model "N-60" indicate?

Accepted Answer

N-60 is the trim family designation — N-60 is a compact-body 2-inch trim, common for lower-flow service. Bean / orifice maximum: 3/4 in max.

Question 4

What end connections does this choke use?

Accepted Answer

Inlet: 2 in 602 Female Weco Union. Outlet: 2 in 602 Male Weco Union. These are Weco wing-union connections — the standard for frac flow iron.

Question 5

Is this choke suitable for sour-service (H₂S) wells?

Accepted Answer

Yes — fully NACE MR0175 / ISO 15156 compliant. Material class EE; body, trim, and elastomers meet NACE hardness limits. Tungsten-carbide trim resists both erosion and sour-service stress corrosion.

Question 6

Can the trim be replaced in the field?

Accepted Answer

Yes — adjustable choke trim (stem assembly, bean, seat) is service-replaceable without taking the body out of line. Bleed line pressure, remove the bonnet, swap the trim insert, reinstall. Indus stocks complete trim refurbishment kits and individual bean / seat sizes; specify the OEM and serial number for the correct fit.

Question 7

What materials are used for the body and trim?

Accepted Answer

Body: Forged AISI 4130 — NACE MR0175 compliant. Trim (stem / bean / seat): Tungsten-carbide bean + Inconel 625 stem + TC seat. Seals: HNBR + graphite packing (sour). Tungsten-carbide hardfacing (or full TC inserts) on the bean and seat is standard for sand-laden flow. Inconel 625 trim is available for severe sour environments.

Question 8

What is the lead time?

Accepted Answer

Typical lead time 35 working days ex-works. Common adjustable choke configurations are usually OEM stock or short-lead.

Parameter	Value
Nominal Size	2 in
End Connection (Inlet)	2 in 602 Female Weco Union
End Connection (Outlet)	2 in 602 Male Weco Union
Bore Type	Standard

Parameter	Value
Working Pressure	6000 psi
Pressure Class	5K
Service Class	Sour (NACE MR0175)

Parameter	Value
API Specification	Other
PSL Class	N/A
PR Class	N/A
Material Class (API 6A)	EE

Parameter	Value
Body Material	Forged AISI 4130 — NACE MR0175 compliant
Trim Material	Tungsten-carbide bean + Inconel 625 stem + TC seat
Seal / Elastomer Material	HNBR + graphite packing (sour)

Adjustable Manual Choke, N-60 Trim, 2 in × 602 F×M, 3/4 in Max Bean, 6,000 psi, Sour Service

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