Tomoe Butterfly Valve
Spare Parts Supplier
Rubber-seated butterfly valves from Tomoe Valve of Japan, read from the type code on the body or plate, so seat rings, discs, stems and operators are quoted for the valve that is actually in the line.
Tomoe types that reach a parts request
Tomoe Valve Co., Ltd. is a Japanese maker built around butterfly valves, with rubber-seated types for general service next to high-performance designs. Ship-supply and surplus listings give its rubber-seated valves by type code, with the body, disc and seat material and the operator written out. The two types named below appear both in the maker's range and in independent supply records; any other Tomoe type is read from its plate as it comes.
700G
Tomoe's rubber-seated butterfly valve for general service, built as a wafer body clamped between two pipe flanges. Supply records show it with an NBR seat and a stainless steel disc, worked by hand or by an actuator. Seat rings, discs, stems with their seals and the operator are the recurring lines, each read against the full 700G code on the valve.
705G
The semi-lugged version of the 700G. Ship-supply catalogue entries carry it with a worm gear, a lock lever or a centre handle, and with an NBR seat. A 705G is not ordered from a 700G list of the same size: seat ring, disc and operator parts are taken from its own code and plate.
Lever · gear · actuator
Tomoe's rubber-seated valves are built for hand operation and for electric or pneumatic actuators, and supply entries show the same type number with a lock lever, a worm gear or a centre handle. The operator has its own parts and, for an actuator, its own plate and mounting flange, so it is listed apart from the valve body.
What puts a Tomoe valve on a parts list
Most butterfly valve enquiries start from one of four complaints, and each one points to a different part of the valve.
Passing when closed
The disc closes against the rubber seat, so a valve that lets water by in the closed position points first at the seat ring: cut by debris, set after years in one position, or worn where the disc edge meets it. Say whether the leak began after a long spell closed or after a long spell open.
Seat swollen or hard
A rubber seat that has swollen, hardened or cracked often means the seat rubber and the medium in the line do not suit each other. State both the seat material code on the plate and the fluid the valve now handles, so the new seat is not a copy of a choice that already failed.
Weeping at the stem
A leak at the top of the body comes from the stem seal, not the seat. Stem O-rings and seals are a separate line from the seat ring, and a valve that only weeps at the stem does not have to be opened up for a full seat change.
Stiff or slipping operator
A lever that will not lock, a gear that turns without moving the disc, or an actuator that stops short of closed is an operator fault. List the operator and its mounting on their own lines, with the actuator plate where there is one.
Tomoe valve items on RFQ lines
Listed by part of the valve: the seat, the disc and stem, and the operator are separate lines, and each one names the valve code it belongs to.
- Seat rings, matched to the valve type, size and seat material on the plate
- Discs in the material shown in the code or on the plate
- Stems and shaft parts, with stem O-rings and seals
- Levers, lock plates and centre handles
- Worm gear operators and handwheels
- Pneumatic and electric actuators, brackets and couplings
- Complete valves of the same type code, where the body is not worth rebuilding
- Flange gaskets and bolt sets for the valve position
Reading a Tomoe valve before a line is quoted
A butterfly valve is quoted from what is marked on it. These details make the request quotable without anyone guessing at a seat:
- Type number and the full code from the valve body or plate, including the letters and digits after the dash
- Nominal size as marked on the body or plate
- Seat material code as marked, for example NBR or EPDM; the elastomer code reader explains the letters
- Disc material as marked or as given in the code
- Operator: lever, worm gear, centre handle or actuator; for an actuator, its own plate and its mounting flange, which the actuator flange identifier helps to name
- Flange standard of the pipework, JIS or EN, or ANSI where that applies; the flange bolt set finder covers the bolting
- The medium in the line and the system the valve sits in
- Photographs of the plate or body marking, the seat and the operator
How a Tomoe valve request is worked
Every line is handled as a genuine part or a checked alternative, confirmed before the quote. For a butterfly valve that review begins at the marking, because the seat ring, the disc and the operator all follow the type code. Where the operator is a pneumatic actuator, the pneumatic cylinder air calculator gives the air it takes per stroke and per minute from the piston diameter, the stroke and the supply pressure.
The seat ring belongs to the model
A seat ring is matched to the valve model and the seat material on the plate. Two Tomoe valves of one size but with different type numbers are not taken to share a ring, and no ring is put forward from the pipe size alone.
Rubber seats are read by code
The seat rubber is marked by its elastomer code, such as NBR or EPDM, and the line states that code plainly. One code covers many compounds, so where the medium is unusual the compound's datasheet is asked for. If the owner wants a different rubber for a changed medium, it goes on the line as a checked alternative, never as a silent swap.
Valve and operator, two plates
The gear or actuator on a Tomoe valve carries a plate of its own. It is quoted from that plate and its mounting flange, so a seat ring order does not pull in a new operator, and an actuator change does not pull in a valve.
JIS or EN before a whole valve
When the body itself is to be renewed, the flange standard of the pipework decides what fits. A valve between JIS flanges is not swapped for one made to EN without the superintendent knowing; where the line is to EN, the face-to-face finder shows the EN 558 series to check.
Tomoe butterfly valve parts — questions from the ship
Is Tomoe Valve the same company as Tomoe Engineering?
No. Tomoe Engineering is a separate Japanese company that makes centrifuges. This page covers Tomoe Valve and its butterfly valves only; send the plate as it reads, and the company name on it routes the enquiry.
Can a seat ring be quoted from the pipe size alone?
No. The ring is matched to the valve model and the seat material on the plate, so a 700G and a 705G of the same size are not assumed to take the same part. Send the full type code, the size and the seat material.
Can the seat be changed to a different rubber?
That is the owner's decision. The quote follows the seat material code on the plate; if the medium in the line has changed, say so, and another rubber is offered only as a checked alternative, confirmed before the quote.
Our valve sits between JIS flanges. Does that matter?
For seat rings and stems, no: they follow the valve. For a whole replacement valve, yes: JIS B 2220 and EN 1092-1 each set their own flange and bolt holes. State the flange standard of the pipework; the bolting can be checked with the flange bolt set finder.
Is the actuator quoted together with the valve?
Only when it is asked for. An actuator or gear has its own plate and its own mounting flange, which the actuator flange identifier helps to name. Send both plates when both are in scope, and say which of the two the request covers.
Is Vessel Core connected to Tomoe?
No, and there is no agreement of any kind. Vessel Core holds no distribution, representation or partnership agreement with Tomoe, and quoting a component against one of its designations implies no approval by the maker and no claim of interchangeability.
Start with the code on the body.
Send the type code and size as marked, the seat and disc material, the operator with its plate, and the flange standard of the pipework. Every line is matched to its own valve before a part number is put against it.
